someone who is very ugly or when someone screws up your plans
god dammit that stupid bitch bonerkill fucked everything up. fuck!!!
by juancarlos December 30, 2005

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A really ugly girl
my cock was hard until i saw the boner-kill
by kapaddy October 23, 2003

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1. When a girl initiates a DTR in the middle of a make-out sesh

2. When someone or something lame interrupts an otherwise enjoyable experience
1. "So, yeah, we were kissing, but then I stopped and said, 'Do you even like me? What does this mean?'"

"You said that? What a bonerkill."

2. "There was good dance music on! Who changed it and put on country? Bonerkill."
by mrs. khalil greene July 14, 2008

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The act of denying three friends a chance to see DJ Tiesto live, and syphoning 3 days out of Barcelona activities.
Brian is a boner kill.
The trip that Brian planned was a boner kill.
Due to the acts of Brians planning, many boners were killed.
Boner kill.
by Keith Hamold July 08, 2010

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The Urban Dictionary T-Shirt

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The Urban Dictionary T-Shirt

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When you are about to get some ass but you don't because something happens
Deshaun: Deshawn: I was about to get with this chanquia and then my parents walked in
Matt: Chanquias are gross thats a major step down from even ayako. Were u curunk.
Deshaun: I kno but it was still a boner kill, and i wasnt crunk
by Deshaun Thomas March 07, 2006

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The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt