To spin one's dick around in circles. Named for the slang word for "Helicopter", it can also mean doing nothing at all or slacking off.
Al- "What are you up to, bro?"
Tom- "Nothing man, just whirlybirdin. How about you?"
Al- "Samezies, I've just been twirlin my dick all afternoon."
Tom- "Nothing man, just whirlybirdin. How about you?"
Al- "Samezies, I've just been twirlin my dick all afternoon."
by AAI April 24, 2008
by AAI April 09, 2007