1. Overtly and possibly excessively enthusiatic.
"Rover was freakin' balls on for the lamb shank; he'd practically dry hump the thing while chewing on it."
by dinobuddy December 27, 2006
Get the balls onmug. 
When one is at the point of just completely going for it, no matter what it takes, to the extreme, with a noble valiance, and courage.
My colleagues, we are going balls-in on this risky business venture, and balls-in is a good idea, not just for the money but doing it for the thing in and of itself!
by realestatephilos January 18, 2017
Get the balls-inmug. by as;dlgkhdfaskjvb September 24, 2006
Get the that's ballsmug. 
Teacher: Now students, I want your balls on me.
*students continue talking*
Teacher: No talking! Put your balls on my face right now!
Tom: ah, its so bright outside
Paul: yeah, the sun is right in my balls!
Gage: My eyelid's are gone!
Paul: that means your balls will be showing all the time!
*students continue talking*
Teacher: No talking! Put your balls on my face right now!
Tom: ah, its so bright outside
Paul: yeah, the sun is right in my balls!
Gage: My eyelid's are gone!
Paul: that means your balls will be showing all the time!
by darksideofthepaul June 29, 2008
Get the ballsmug. A less obscene way of saying, "fuck that". An expression of laziness and lack of enthusiasm/interest to do what is asked.
by Dedguy August 2, 2009
Get the Balls to thatmug.