Green’s Dictionary of Slang

slimy adj.

[SE slime]

1. deceitful.

[UK]Wild Boys of London I 6/1: We calls Pug the moocher ’cos he fakes all the slimy dodges, don’t yer know.
[US]Heggen & Logan Mister Roberts I i: Why, you slimy, lying son-of-a-bitch!
[US]B. Hannah Geronimo Rex 263: You haven’t ever been slimy around me before. Being tricky-devious on me.

2. (US black/campus) very unattractive.

[US]Eble Campus Sl. Nov. 7: slimy – unattractive, applied to member of opposite sex: That slimy guy in my math class called me again.
[US]Ebonics Primer at [Internet] slimy Definition: a female who is very ugly. Example: That bitch Kashawna is slimy.