Fa-la-la-ing mall music

[bunsen_h]

Now it is the month of May-ing
Fa-la-la-la-la la-la la la
When the mer-ry lads are play-ing
Fa-la-la-la-la la-la la la
E-each with his bon-ny la-ass
Fa-la-la-la-la la-la la la
Down up-on the green-y gra-ass
Fa-la-la-la-la la-la la la

And so forth.

(You all know what the "fa-la-la"s are all about, right?)

Edited to add:

If you prefer a non-masculopresumptive version...

Now it is the month of Maying
Fa-la-la-(etc.)
With the merry lasses playing
Each with her bonny lads
Down upon the greeny grass

The non-heteronormative versions are trivial and I will leave them as an exercise for the reader.