Jangum

The act of manually stimulating the penis to please oneself, in order to achieve orgasm and ejaculate releasing copious amounts of love juice, splooge, cum or baby-batter onto a predetermined location such as a comforter, pillow or other cushiony object in a retaliatory act.

"Man, my girlfriends been a real bitch to me lately..."

"Dude! You should Jangum on her pillow!"

or

"My wife is mad because i ruined our new sheets when i Jangumed her"