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1.
The pubic hair surrounding one's cock and balls. Generally unkempt, resembling an overgrown bush.

Coined by Dealbreaker.com
He used his notoriously overgrown cock-bush in lieu of a Swiffer.
by CertainSomeone InStamford April 24, 2009
 
2.
To stealthily entrap a friend/stranger/relative(?) in a situation whereby you antagonise them over a virtual medium (text, social network, etc.) until they decide to confront you due to frustration and/or the sake of theatrics; in accordance with their response the baiter then surprises the unsuspecting baitee with their emancipated genitalia.

The subsequent reaction to this unabashed exposure on the baitee's part may be subject to a time-delay, depending on the level of tension previously generated before the 'cockbush'.
"My housemate was totes baiting me for a cockbush! He well and truly flashed his dongle in my direction; how sullying."

"Beware that alleyway - cockbushers are known to target those inexperienced in the ways of cockbushing..."

"I cockbushed a total stranger, ergo my prison sentence."
by Phallus in a Pumpkin Patch November 21, 2012