Used as a shortened of "I'm crying," popularized by tumblr users. Never used as feeling of sadness, but shocked hilarity. Induced by something funny as a whole.
person one: the use of bpd is best with..
person one: whoops i mean bcp, what the hell is bpd??
person two: birth penal detention?
person one: im crey
person one: my dad just texted me saying "I want to sex Mila Kunis up"
person two: im crey