Saying or typing the word cock repeatedly without having any control over it.
All direct quotes from @cosmicgirlie (who has cock tourettes) on Twitter

Sometimes a cock just totally creeps up on me unawares.

I think I may have slipped several cocks in already, without even thinking about it.

Cock.

Don't make me throw a cock out there now.

I yell cock on a more regular basis on twitter. That, and I often get my boobs out.
by Laura AWNTYM February 23, 2010
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