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1.
An intense desire and need for the slay. Just like rabies your mouth starts to water and you foam at the mouth and start to lose your mind if you do not slay soon
I hope these girls can cure my wicked slaybies
by pener April 03, 2005
 
2.
Derived from "layby" where a person is obviously underage, you are marking them for sex at a later date
Shit she was hot, Bro she was way too young, Ahwell I'll put her on Slayby
by x_st3v3 February 13, 2011