1. The act of talking out your ass - most likely to occur when intoxicated

2. Giving verbal agreement to do something, but not following through

3. Slang for: a lie

4. exaggerated or unrealistically magnified
At the bar, my friend was "flapping cheeks" about waking up early and getting on the mountain at 9:00 to go snowboarding. It's still noon and I haven't heard from her.

Over drinks and dinner last night, my boyfriend "flapping cheeks" when he said he would mow the lawn the next afternoon. The next day, he forgot that he had "work" to catch up on and didn't have time.
by scoll255 June 08, 2009
Top Definition
What you get when you blow a prodigious fart. Your cheeks flap in the breeze.
Madelaine sure has a bad case of flapping cheeks today. You'd best stand in front of her when you ask her out.

Heap Big Chief Flapping Cheeks was a flatulent donkey who amused many people with his hind end.
by Joao Bufamarillo May 13, 2005
What you get when you let a prodigious fart, or binderfender: your cheeks flap.
Bronwyn got a bad case of flapping cheeks in dance class today. She cleared the room three times.
by The Wog Whomper May 11, 2005
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