The act of shoving one's cleavage in another's face. The culprit generally pretends that the act is accidental, though she is conscious of the sexual alarms that ring in others at the sight of large semi-exposed breasts (to make an impact, the cleavage must be pronounced) in our faces.
I noticed Gemma over by your supervisor's desk. She dropped her pen on his chair, literally said "oops" then bent down to give him a full two-second heavage. I guess I know who’s getting that promotion."
by Dizz Markie June 10, 2010

A fictional significant other. That is, a boyfriend/girlfriend/spouse, one that a friend frequently refers to, that neither you nor any of your friends has met. Refers to the slang boo as a sig. other, and, obviously, a reference to the secretive, mostly-hidden character in the novel, To Kill a Mockingbird.
"I should bring my girlfriend out from New Jersey for prom..."
"Oh, the internet one no one has ever met? Your Boo Radley?"
"Oh, the internet one no one has ever met? Your Boo Radley?"
by Dizz Markie April 24, 2007
