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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!"


"My wife is mad because i ruined our new sheets when i Jangumed her"
by Nemesis350 November 09, 2009
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