Colloquially it is a synonym, but technically the "Sin of Onan" for which it is named for is actually an instance of coitus interruptus.
"Onanism -- it's a hands-on job"
-Ghost, ENTER THE MATRIX
96๐ 17๐
from New Latin onanismus, from Onan, son of Judah (Gen 38:9),
masturbation, coitus interruptus, self-gratification.
Jon can'g get any, so he practices onanism.
102๐ 37๐
Ejaculation outside the vagina.
I think someone did onanism in my coffee again. That sure aint milk.
Well you would know scab mouth!
74๐ 34๐
The withdrawl method of birth control
(removeing ones penis before reaching orgasm)
-not an effective method of birth control
26๐ 51๐
Stands for One Network America News network. Sometimes mistakenly referred to OAN, ONAN is a small-time, mom's basement "news" operation. Shows are typically hosted by distended colons and strung-out gap-toothed cam girls. Owned by Gil "Red" Herring, their only real claim to fame is the manufacture and marketing of matching sets of presidential knee pads and butt snorkels.
"Did you see that 'reporter' from ONAN at the federal conronavirus briefing? What do you think will happen first--she finally gets her adult teeth, or she promotes out of fifth grade this year?"
37๐ 4๐
to wank,
to tame the one eyed monster,
to make the cyclops cry,
man's favourite outlet,
a date with mrs palm and her five
lovely daugters,
toss yourself off,
etc etc
"now on the subject of onanism...we dont want to find you hunched double on the sofa bed pumping your fist" (league of gentlemen)
216๐ 49๐
Short-hand for "on another note"
Grace: are u going to Chad's party on Friday?
Ben: nah too many frat boys. onan do u wanna go Chilli's on Sat?