When you're having sexual activity boys crouch expands in length as he is feeling immense pleasure.
Lily:"Josh harder! MORE HARDER!"

Josh:"You're giving me a boner!"

Lily:"Yes you're making me cum!"
by Lil_boy November 10, 2019
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*Bon·er (name)
-Proper Name; Boner (English, American) is a common nickname for Eric Shinn.
*bon·er (noun)
-Vulgar Slang; An erect penis.
His name is Erection, but all his friends call him Boner.
by reflectionpoint January 17, 2010
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Erection of the genitals from excitement or pleasure.
Timmy got a boner when he saw Becky swimming naked in her backyard.
by Frat Guy 2009 May 6, 2013
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A hardening of the penis when sexually aroused, if this occurs u must stick it in a vagina until it sneezes out milk
by Hortonhearskeem March 1, 2017
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A wonderful thing that happens to men when they think about girls.
I just got a boner while thinking about Donald Trump.
by ricegum_sucks May 20, 2018
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when a mans penis grows to it’s full size when his girlfriend does something cute
“omg Ella i’m getting a boner
by Division November 30, 2019
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