Top Definition
1. An ugly girl

2. Lesbian

3. a person who ruins something (i.e- party pooper)

4. a person who ruins an erections by means of anything

5. someone who is so horrific looking that they may prevent futher drinking and partying
EXAMPLES: (( THEY GO ALONG WITH EACH DEFINITIONS BY NUMBER))

1. Dayum that bitch is bonekill

2. She had me going; but turns out shes a bonekill

3. Stop being such a bonekill

4. she sucked my dick soo good; that bitch is a bone kill

5. I woke up next to a bone kill; dayum i never want get trashed again.
by siick_wiit_it_xox December 12, 2006
When a person causes your boner to go away.
Man, Sarah gave me a bonekill yesterday.
by King Duck III May 02, 2016
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