15
The cherry on top. The insult added to injury. The final, amazing (or awful) finishing detail that caps the entire thing off.
"Here's the capper - I was sleeping with her sister!"
by Q-Who June 18, 2013
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16
A capper broke into my car last night and took my GPS.
by liquidassnotice January 12, 2009
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17
A girl who invites a girl over to her place and nothing happens.
Man, don't even talk to Jennifer. I went over there last night and nothing happened. She's a capper.
by sugeknight February 19, 2008
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18
Derivation: night cap

When the bar is closing and you gather all your people together and head to one of their houses to keep drinking and mess the place up, that is a capper. Also known as an after-party.
Q: Hey man, where's the capper at?

A: I dunno man, I think Dave's, he's got booze.
by Gilmour93 October 21, 2008
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19
(1) One who writes captions to screengrabs on the Scifi channel website.
(2) Anyone who writes captions to photos or screengrabs online.
(3) The elite of the MST3K fans.
Some legendary capers include gray zombie, glitterrock and jondapicam.
by jondapicam November 05, 2003
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20
A derrogatory name for Cuban Yorisha gang members.
As in:
Scrap to Surenos
Chap or Buster to Nortenos
Pracinas to Hatian filiteros
Capper to Cuban Yorisha
by guantanamera05 November 12, 2011
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21
The only way to take a mark in AFL.
Used by commentators when he took a mark "Capper"

Or used to describe the act of speccy marks "I was taking Cappers across the half forward line all day"
by Timbo69 June 20, 2007
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