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Using the same idea as a Selfie but not a picture of your face, a picture of your own penis in it's full entirety with pride and glory.

Typically, taking a picture of your own penis and posting it online, that's a Cocksie. Perhaps for Charitable causes or just for fun to share with your friends!
Why does my willy look small in a Cocksie?

John, can do me a favor and take my Cocksie.
(Facebook post): Here's my Cocksie for Cancer Awareness
Best thing not to do after a first date mate, is send her a Cocksie!
by londonboi April 17, 2014
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