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1.
1. Noun: A girl/boy who stops stroking the meat RIGHT when you are about to cum. This term only applies to a Handjob/Blowjob but only when the orgasm is ruined.
Alex: Hey dan your mom is a cock stopper! She stopped suckin RIGHT when I began to shoot it and it ruined my orgasm.
by Pectabyte August 03, 2006
 
2.
A guy or girl that initiates sex then won't give it up. tease
I was so horny last night , and Michael was being a stupid cockstopper.
by Your Mom November 27, 2004
 
3.
A valve used in chemistry for titrations that controls the flow of a liquid (preferably white). They are prone to leakage and can cause a large, white mess. Cock stoppers are sometimes refereed to as "cocks" for short.
Dude did you see his 'cock was leaking? That will make a mess! Those cock stoppers are so gay!
by shoeman123 June 02, 2011
 
4.
a girl with a huge honker that stops the schlong from fully penetrating the throat.
I tried to get some deep throat action from her but that bitch has a huge cockstopper!
by fordposse August 29, 2008
 
5.
A moment when the cock stops beating and its functions die because of an ugly ass bitch sighting.
Omg..look at that fuckin cockstopper.

Dude..your moms a cockstopper.
by Ray December 07, 2003
 
6.
a female that has a large nose, hence preventing her from performing an proper blowjob.
did you see the cock stopper on that bitch?
by jerryduschbag January 11, 2011
 
7.
1. Finding out the "woman" you are bedding has a penis. In all but 1% of men this is known to stop the cock dead in it's tracks returning to it's flaccid form.
See Eddie Murphy.
by Bud E Love May 16, 2003