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In computer security parlance, fuzzing is the art of automatic bug finding. This is done by providing an application with semi-valid input. The input should in most cases be good enough so applications will assume it's valid input, but at the same time be broken enough so that parsing done on this input will fail. Fuzzing is mostly used to uncover security bugs.
The fuzzer spent the afternoon fuzzing his company's parts ordering system to crack the application.
Fuzzing by spoonyfork February 6, 2006
verb.
Fuzzing is caused by the lack of blood flow in a particular area thereby producing a vibrating sensation. Fuzzing is most common on the face and hands and may cause light-headiness. Common causes of Fuzzing may be alcohol, a weed-induced high or a rush of adrenaline. Fuzzing is a short-term sensation and will wear off over time -- make the most of it.
"Oh man, my face feels like it's fuzzing"

"haha I'm starting to fuzz now"

"I'M FUCKING FUZZING!"
Fuzzing by CK_x3 January 19, 2006
Whenever you are so drunk your ears and eyes wont function correctly
Jake said "My ears are fuzzing and my eyes are fuzzy"
Fuzzing by Josh1keflab March 3, 2017

Peach Fuzzing 

The female equivalent of "tea bagging": placing their privates onto the unsuspecting faces of their victim. Word suggests a decent amount of pubic hair.
Toby was unfortunate to fall asleep during his bachelor party and his friends paid the stripper to give him a good peach fuzzing while they took pictures.
Peach Fuzzing by WOE_ne December 2, 2010

Fuzzilingus 

the act of using your newly shaved head to "give head" to a woman, rubbing the fuzz up and down on her vagina like a deer rubbing its antlers against a tree.
I love it when Mickey shaves his head. I always look forward to some hot fuzzilingus once he's done
Fuzzilingus by TNT Music Factory October 27, 2010
a word made up for people who don't cuss. it means fucking freezing. is usually used in the winter
i hate winter, it's fuzzing