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1.
Usually a penis that can drive into people or objects with as much force as a hammer. It can be used in multiple ways like the word fuck, and is more cool when you type it in all caps.
That guy is a real Cockhammer in bed

This lecture is such a Cockhammer

John "COCKHAMMER" Smith gets so many women, to bad they are all dwarfs.
by Upthemeds October 30, 2009
 
2.
1. A person who who does nothing but bitches and pisses you off to the point of it being like smashing your cock...with a hammer.
1. GODDAMMIT BERNICE YOUR BEING A TOTAL COCKHAMMER RIGHT NOW!!!
by GoliathOnline November 06, 2009
 
3.
An event or situation making the likelyhood of action probable. The opposite of a cock block.
"Thats totally a cock hammer! Danielle is gonna be in the other bed so Jesse will have to sleep with you!"
by haggardp2lfc November 28, 2006