A flabby upper arm that jiggles when you raise it and move it around, not unlike the arm of an overweight senior citizen who spends all her free time frantically waving her hand at the bingo table.
"Don't wave while wearing a short-sleeved shirt or people will see that you have a bad case of bingo arm."
by Kate the Grammar Vandal May 1, 2008
Get the bingo arm mug.When you are kissing your gilfriend/boyfriend while lying down, and one arm is trapped between you, getting in the way and flapping about a bit.
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