A bone in occurs during intercourse between a male and a female, when the female has exercised her vaginal muscles to the extent that she is able to force her labia through the base of the male's crotch, absorbing a large portion of his pelvic region.

It can also occur during sex between two males, where the receiving male has exercised his anus enough to perform the act.

Scholars are still unsure whether this came before or after the bone out.
I love my girlfriend, but I'm afraid she may want to bone in.

If you're on the road to prison, it may be valuable for your well-being to master the technique of boning in.
by SpenSpenni January 17, 2011
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The art of a male passionately penetrating his female counterpart with an erect penis.
I gave her good boning last night!
by Door connoisseur February 9, 2018
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Having an erect penis; having a boner; having a hard on; being on hard
After Mary gave him a lap dance, John was on the bone.
by donJon November 24, 2006
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1)v. to fuck
2)n. a smokeable item (joint, cigarette)
3)n. money, usually in dollars
4)n. boner
5)adj. prefix meaning stupid
6)idiom: to throw a bone - to show sympathy towards another
7)n. hard skeletal tissue
1)Hey, Christen, want to bone tonight?
2)Pass that bone down this way
3)Can you spot me a few bones?
4)He popped a huge bone when he saw your mom.
5)Don't be such a bonehead!
6)I threw you a bone and helped you cheat on that quiz.
7)He busted a bone in his hand.
by The General June 3, 2004
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v. to be a lonely male with a boner, especially one that needs immediate attention. More than likely will be taken care of by Ms. Palm and her 5 little nieces.
I am feeling so bonely tonight that I will be pulling my pud as soon as I make it to my car.
by pornhorn50 January 13, 2010
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*Why haven't we Boned yet?
by nightterror November 19, 2009
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