look up any word, like the eiffel tower:
 
1.
Lacking in brain power
You numbfuck can't you get anything right!
by Kelly July 18, 2003
 
2.
When a couple is having sex and all of a sudden the man loses his errection.
Dave: Shit, NO! Not again. I losing my errection.

Sandy: SHIT, Dave you're such a numb-fuck.
by R_Courtlandt January 12, 2009
 
3.
One who preforms mindless and seemingly unrewarding activities over and over again. Often used as a synonym for fucktard or stupid. Do not confuse it with dumbfuck.
Due to the large number of numbfucks who attempt to add the names of their friends and pet goldfishes to the Urban Dictionary who are clogging the system, this definition will likely languish for six months before being reviewed and ultimately being rejected by another numbfuck who mistakenly believes that its fun to just click reject on everything they see.
by Mr. Normal May 03, 2007
 
4.
When someone is so bad at fucking that you can barely feel it, they can be called a Numbfuck.

Numbfuck can also be used as an insult to someone who is blindingly stupid.
Girl 1: Omg, Brad and I did it last night!
Girl 2: Really? How was it?
Girl 1: He's a total numbfuck!
Girl 2: Ah, that's too bad.

or

Woman: Angelica! Why did you put the butter in the microwave? You're a total Numbfuck!
by RosalineG April 25, 2009
 
5.
where a man repediatly smacks his hard cock on a female's twat until it becomes sore. then he takes his hand and smacks the clitoris, and immediatly pinching it afterwards. the man would then take his hands and cuff the cunt as hard as he can to prevent blood from entering the beat pussy. this would cause the pussy to fall asleep. once the cunt turns blue/purple the man grabs his cock and fucks the numb twat. the female should now feel an odd sensation of blood rushing back into her pussy combined with an orgasm.
an example of "blood rush" would be someone tightly cuffing your wrist. causing your hand to fall asleep because the hand blocking the blood from entering through the wrist. and when he/she lets go of your wrist, you feel an odd sensation of blood rushing back into your hand. (as described in the "numb fuck" practice.
by ST3V3 P. October 23, 2008
 
6.
where a man repediatly smacks his hard cock on a female's twat until it becomes sore. then he takes his hand and smacks the clitoris, and immediatly pinching it afterwards. the man would then take his hands and cuff the cunt as hard as he can to prevent blood from entering the beat pussy. this would cause the pussy to fall asleep. once the cunt turns blue/purple the man grabs his cock and fucks the numb twat. the female should now feel an odd sensation of blood rushing back into her pussy combined with an orgasm.
an example of "blood rush" would be someone tightly cuffing your wrist. causing your hand to fall asleep because the hand is blocking the blood from entering through the wrist. and when he/she lets go of your wrist, you feel an odd sensation of blood rushing back into your hand. (as described in the "numb fuck" practice.
by ST3V3 P. October 23, 2008