Top definition
A man who tries to 'steal' another mans john, by pulling too hard during a handjob.
by Hubert Gallon June 11, 2006
Get the mug
Get a Ninjajohn mug for your cousin Abdul.
Jul 2 Word of the Day
Someone people turn to when they're sad who makes them feel better.
Dude, I was so unhappy about my girl, until I spoke to my serotonin donor who really helped me feel better
by jonfurstn1 November 27, 2009
Get the merch
Get the serotonin donor neck gaiter and mug.