A formation of military recruits that lines the nude men up in a single-file line such that one man's genitals are essentially pressing against the butt crack of the guy in front of him. This is done during induction between the time the men surrender their civilian clothes and when they are finally issued their military uniforms, to allow the medical examinations and inspections to be expedited.

The Nuts to Butts line up also has the effect of revealing those recruits who enjoy the experience as they would likely sprout an erection and could be rejected by the commanding officers who wanted to weed out homosexuals.
Recruits! I want you to line up nuts to butts and march into the examination room, NOW! MOVE IT!
by Fallo Turgidson October 20, 2013
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Also known as grinding, a type of club dancing where the male dry humps the female. Hence, nuts are to butts.
My high school banned nuts to butts dancing, but we can do it in college.
by Steven L Smith October 15, 2006
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1. A term used when one's outlandish behavior has exceeded the proper usage of "crazy" or "nuts".

2. Can also be used for one who is a frequent admirer of the buttocks region of the human body.
Individual 1:"I'm going to watch Twilight. Want to come?"

Individual 2:"HELL NO. You must be out of your damn mind. You are NUTS FOR BUTTS."

or

Individual 1:"Dayyyuumm that boi is hella fwine riiigght?!"

Individual 2:"Nahh gurl you are just str8 up nuts for butts"
by heyitsmeee December 9, 2010
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A phrase used to ask whether something is good or bad, with nut denoting good and butt denoting bad.
Person 1: Is my new hat nut or butt?
Person 2: That hat is nut for sure!
by swagmoneyplaya November 28, 2018
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A threesome involving two men and a woman and double penetration. The two men configure themselves in such away that one man's nuts touches the other man's butts. Some say it's a myth and cannot be done, and maybe that's a good thing.
"Yeah man, Ray and Nick went nuts to butts on that broad all night"
by Joey Joe September 22, 2006
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adj. Wild. Frequently associated with overreacting in situations.
Mike: Hey KO, remember when we were making fun of your scar and you locked yourself in the bathroom?
KO: Yeah, I was pretty nuts in the butts back then.
Mike: Why'd you get so worked up about it?
KO: SHUT THE HELL UP MAN IT'S A SENSITIVE ISSUE
Al: I guess you could say that KO is acting a little...nuts in the butts
by The Councelman October 3, 2011
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