The term is most commonly referred to as,

(verb)

1: a physical act performed by the male partner, immediately preceding sexual intercourse in a rear-entry position.

2: To position one's self to sexually penetrate his partner, specifically in a back-entrance position, otherwise known as 'doggy-style' (common slang).

3: To prepare for copulation.

4: When a stallion (a male horse) positions itself on top of the female horse, just prior to breeding. This pre-penetration act is known as nucking.
In a 'doggy-style' position, the male is typically standing on his two legs and supporting himself with one of his arms either on the floor or the female's back. Meanwhile, he is stabilizing himself by adjusting his footing/balance, if you can picture that. The male is nucking, getting ready to penetrate the female. It is the most natural, primitive state of sexual intercourse between male and female. (i.e., as the beast nucked in preparation for copulation, the excruciating anticipation of the pleasure awaiting him caused his erection to jump and ooze with pre-ejaculate fluid.)
by Derell Johnson February 21, 2014
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A Baltimore slang that can mean whatever you want it to mean. Typically used to refer to your homies. Coined by the famous Baltimore barber Bippleyipsnip.
1. What’s up nuck?

2. Fuckalyootz jigguhluhbang gewtsmanaggin stupulahdoogetz nuck.

3. I got this nuck over from over there.
by manuck October 15, 2021
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nuck, often preceding the word buck.
to nuck is to acutally participate in a fight after the preliminary offense of buck is issued.
'y0 boy was you lookin at my hoe'
'wat if I was?'
'well nuck if you buck'
by brian skimmons December 28, 2005
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A person who is careless about everything. Combines the words no and fuck.
Yo, that girl Jaura is such a nuck
by MrClean20 December 20, 2019
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Short for knuckle, as in knuckle up, prepare to fight.
"Dont get nuck 'less you ready to throw down"
by Sylkki August 2, 2006
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Smaller cracks webbing from a larger crack or crevice.
"Look! the frog crawled into the crack!"
"No, it crawled into one of the nucks of the crack actually."
by woahohoe September 25, 2018
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