Taken from the Leetspeak entry on Wikipedia
Morphology
The -xor suffix
The meaning of this suffix is synonymous of the English -er and -r suffixes (seen in hacker and lesser),[2] in that it derives agent nouns from a verb stem. It is realized in two different forms: -xor and -zor, pronounced /-sɔr/ and /-zɔr/, respectively. For example, the first may be seen in the word hax(x)or (/ˈhæksɔr/) and the second in pwnzor (/ˈoʊnzɔr/). Additionally, this nominalization may also be inflected with all of the suffixes of regular English verbs.
The -age suffix
Derivation of a noun from a verb stem is possible by attaching -age to the base form of any verb. Attested derivations are pwnage and speakage. However, Leet provides exceptions; the word leetage is acceptable, referring to actively being leet.[7] These nouns are often used with a form of "to be" rather than "to have," e.g., "he is pwnage" rather than "he has pwnage". Either is a more emphatic way of expressing the simpler "he pwns," but the former implies that the person is embodying the trait rather than merely possessing it.
The -ness suffix
Derivation of a noun from an adjective stem is done by attaching -ness to any adjective. This is entirely the same as the English form, except it is used much more often in Leet. Nouns such as lulzness and leetness are derivations using this suffix.
Words ending in -ed
When forming a past participle ending in -ed, the Leet user may replace the -e with an apostrophe, as was common in poetry of previous centuries, (e.g. "pwned" becomes "pwn'd"). Note that the conventions of Leet allow for some misplaced punctuation, since it is assumed that the user is typing very quickly; therefore the apostrophe may shift its position without changing the word's meaning. The word ending may also be substituted by -t (e.g. pwned becomes pwnt).[8]
Use of the -& suffix
Words ending in -and, -anned, -ant, or a similar sound can sometimes be spelled with an ampersand (&) to express the ending sound (e.g. "This is the s&box," "I'm sorry, you've been b&", "&hill/&farm"). This is most commonly used with the word banned. An alternate form of "B&" is "B7", as the ampersand is typed with the "7" key in the standard US keyboard layout. It is often seen in the phrase "IBB7" (in before banned).
Use of the "-zorz" suffix
Words that are generated on the internet (such as pwn) can be made into a plural by putting "zorz" on the end (generating the word pwnzorz in this example). The -zorz suffix can also be used to strengthen the meaning of the word (pwn means to be defeated or to be made a fool of; pwnzorz means to be really beaten or be made a fool of in a large way)
The -xor suffix
The meaning of this suffix is synonymous of the English -er and -r suffixes (seen in hacker and lesser),[2] in that it derives agent nouns from a verb stem. It is realized in two different forms: -xor and -zor, pronounced /-sɔr/ and /-zɔr/, respectively. For example, the first may be seen in the word hax(x)or (/ˈhæksɔr/) and the second in pwnzor (/ˈoʊnzɔr/). Additionally, this nominalization may also be inflected with all of the suffixes of regular English verbs.
The -age suffix
Derivation of a noun from a verb stem is possible by attaching -age to the base form of any verb. Attested derivations are pwnage and speakage. However, Leet provides exceptions; the word leetage is acceptable, referring to actively being leet.[7] These nouns are often used with a form of "to be" rather than "to have," e.g., "he is pwnage" rather than "he has pwnage". Either is a more emphatic way of expressing the simpler "he pwns," but the former implies that the person is embodying the trait rather than merely possessing it.
The -ness suffix
Derivation of a noun from an adjective stem is done by attaching -ness to any adjective. This is entirely the same as the English form, except it is used much more often in Leet. Nouns such as lulzness and leetness are derivations using this suffix.
Words ending in -ed
When forming a past participle ending in -ed, the Leet user may replace the -e with an apostrophe, as was common in poetry of previous centuries, (e.g. "pwned" becomes "pwn'd"). Note that the conventions of Leet allow for some misplaced punctuation, since it is assumed that the user is typing very quickly; therefore the apostrophe may shift its position without changing the word's meaning. The word ending may also be substituted by -t (e.g. pwned becomes pwnt).[8]
Use of the -& suffix
Words ending in -and, -anned, -ant, or a similar sound can sometimes be spelled with an ampersand (&) to express the ending sound (e.g. "This is the s&box," "I'm sorry, you've been b&", "&hill/&farm"). This is most commonly used with the word banned. An alternate form of "B&" is "B7", as the ampersand is typed with the "7" key in the standard US keyboard layout. It is often seen in the phrase "IBB7" (in before banned).
Use of the "-zorz" suffix
Words that are generated on the internet (such as pwn) can be made into a plural by putting "zorz" on the end (generating the word pwnzorz in this example). The -zorz suffix can also be used to strengthen the meaning of the word (pwn means to be defeated or to be made a fool of; pwnzorz means to be really beaten or be made a fool of in a large way)