A unit of length as measured by balls so droopy that if the owner sat on a toilet (also known as a Jon), they touch the toilet water.
Ms. X: How much of this fruit-by-the-foot do you want?
Ms. Y: About a Jon's balls worth.
Ms. X: Wow, that much?
Ms. Y: Yeah, I'm pretty hungry.
Ms. Y: About a Jon's balls worth.
Ms. X: Wow, that much?
Ms. Y: Yeah, I'm pretty hungry.
by kgb123 September 1, 2013
The act of performing a T-bag sexual act but instead of plopping your sack on the victims face, you slap the victim with your sack at a high velocity so you hear it smack against the victims face thus performing a "Jon Ball".
by Jdtodd July 6, 2017