The shortened version of "you're an ibex", as in the Alpine Ibex mountain climbing goat.

It's what you'd say to your buddy when he's playing it way too slow with a chick, because he isn't making any moves. This term was coined by comedian Chris D'Elia on his podcast entitled Congratulations, on September 18th, 2017.
Mark: "Dude I'm not sure she likes me, we've been on seven dates and have barely even made out."

Chris: *texts make a photo of an Alpine Ibex* "y'ibex."
by Baby Nance September 21, 2017
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