1. A person who behaves like a douchebag.

2. Name for a person who does something that is considered taboo in social groups.
1. Stop being such a chestnut and come play with us.

2. Liam, stop sending us selfies of you without a shirt, you are such a chestnut.
by 1hok August 03, 2020
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a boobjob, where a man's nuts meets a woman's chest
Dude, katie and andy just chestnutted last night.
by AznUrban March 26, 2010
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To punch somebody for little to no reason
"So we were at this bar having a good time, when out of nowhere Zach just chestnuts a complete stranger, and we got thrown out.
by Rob Freidman January 27, 2008
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when you lay down on your back, jerk off, and jizz on to your chest.
Hey baby I just chestnutted, I almost lost control and wallnutted.
by bladee August 28, 2015
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When a man ejaculates on a woman’s breasts and the woman proceeds to lick the seman off her breasts and swallows it.
Ayo is it okay if I give you a chestnut to spice things up Abby?
by 20joek March 02, 2019
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When a guy pulls out to blow on a girl's chest, then proceeds to dive forward and smear it across her chest in a Slip and Slide motion.
- After I pulled out I gave her a Chestnut.
-Damn dude, did you slide off the bed?
by Rupert Pupkin VIII April 08, 2010
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To bust a nut on a male or female's chestal region.
Cait didn't even see it coming, but for her birthday, I gave her a huge chestnut.
by Semen Cbass May 07, 2006
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