A really retarded synonym for almost every word in the English language. Jenkin is often used by akward teenagers and people who can't find a creative synonym for many words.
Phil- Yo I was at the store and this guy told me the chips were on sale
Alex- Oh my god thats so Jenkin
noun. A "jenkin" is a person who is always complaining, easliy annoyed, and usually a bitch. To be a jenkin you would have to be extremely condescending and never pay attention to anybody elses ideas because you think you have even better ones.
verb. To jenk or to be jenking, would be to insist that you are the best at everything and no one could ever be better.
"Dude, I'm tired of you always jenkin', just listen to what I have to say".