To drink alcohol, perhaps excessively. Come bend your elbow at the bar with us tonight!If you're this hung-over, you must have really bent the elbow at the party last night.
bend one’s elbow
and bend the elbow and lift one’s elbow
tv. to take a drink of an alcoholic beverage; to drink alcohol to excess. He’s down at the tavern, bending his elbow. If you didn’t spend so much time lifting your elbow, you’d get more done.