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1.
a condescending expression used on body building and fitness forums to question the legitimacy of someone’s fitness expertise or weight lifting routine. Similar to other interrogatives like “U Mad?” or “U Jelly?”, the phrase is mainly used to aggravate another user during arguments about physical fitness.
John: There's no way you'll make it on the football team.

Brian: Bro, do you even lift?
by angrymongolian May 25, 2012
 
2.
A phrase used on an individual who say's that they try whatever they can to get "beefed" at a gym, but meet no result.
"Man every time I go to the gym, I NEVER get even a slightest bit of muscle..."
"Dude, do you even lift?"

"Crap, I can't even lift 20 pounds."
"Man, seriously, do you even lift?"
by DYEL Guy August 20, 2013