by DarkNova December 12, 2001

by i_like_to_mosh May 13, 2005

They are two vine famous teenagers from Nebraska. They also have many good songs like "doing it right" and "flights". Jack Johnson and Jack gilinsky are also very hot.
by I love to turn up August 11, 2014

The Jack to Jack (Back to Back Jack) Is the attempt to masturbate immediately following a previous orgasm.
by CharitableNinja February 08, 2009

Person who is kind & wholesome until pushed over the line. Reference to baby JackJack from "The Incredibles" Movie.
Don't keep pushing him. He's going to go Jack-Jack.
Be careful with him. He's got a Jack-Jack personality
Be careful with him. He's got a Jack-Jack personality
by moviedude March 09, 2008

When a guy is jacking off and is interrupted by a second individual who "lends a hand" and finishes the job.Ideally,the interloper could be the wife,girlfriend,a hot maid,or cute neighbor girl. Strangely,the good samaritan could be a sister,grandma,brother or roommate.
by wolfbait51 May 24, 2011
