Top Definition
The act - either planned or unplanned - of falling to sleep after masturbating.
I was just going to rub one out, but I ended up masternapping for an hour.

Bob's been away from his wife for two days, so he went upstairs for a masternap.
#jerk off #pleasure oneself #skeet #mb #wack off
af ScottNWDC 16. maj 2011
Where somebody goes and masturbates, then quickly falls asleep.
"gotta go masternap"

"*Fap Fap Fap Fap*

"Zzzzzzzzzzzzz...."
#fap #masturbate #sleep #ejaculate #tired
af Master Napper 2. oktober 2011
When you masturbate and the climax is forceful enough to knock one into slumber.

Invented by Jeremy from Boise.
"Dude, you look well rested."

"Ya, bro, that's because I took a master nap after school today!"
#masturbation #nap #sleeping #jacking off #semen
af MasterNapper 5. september 2011
When a male/female masturbates before bed, in an attempt to fall asleep during orgasm. Masturbation + Nap= Maternap
Timmy: jeez man you were out like a flash last night...?

Billy: yeah bro, had a cheeky masternap and fell right asleep

Timmy: aww man WTF thats sick

Billy: dont lie....we have all done it

Timmy: yeah....
#masturbation #nap #funny #master #sleep #timmy #billy #marshall #mckenzie
af xXmC-KeNzIeXx 18. november 2011
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