A first and merely qualitative attempt:
Degree of concern disclaimed
Acoustic Unit
Scatologic Unit
Erotic Unit
Significant
Hoot
Shit
Fuck
Detectable
Whinge
Fart
Stroke
Extreme
Holler
Sewer
Orgy
Notes:
1) The use of toss for stroke is henceforth deprecated, due to its popular abuse as a synonym for the larger unit. It is probably not worth bothering with at all.
2) The levels of indifference within each magnitude category are conjectured to be approximately comparable across scales, but accurate determination of the conversion ratios awaits a fully comprehensive survey of the socio-linguistic-apathetic landscape, and:
3) Nobody gives that much of a Care Bear.
This entry originally posted on Dreamwidth at
http://caper-est.dreamwidth.org/96720.html - comments preferred there, if you have a foot in both camps.