Someone who belongs to a regimental/military program and defends its values religiously, without regards to their personal and social values or the effects of defending those stupid, stupid values. A regcock is to the United States Merchant Marine Academy what a blue falcon is to the United States Air Force Academy, or what a buddyfucker is to West Point.
"Dude, I just got stuck with a Class II for having my room messed up! CC is such a fucking regcock faggot."
by theMarin3r March 21, 2009
When your cock is bloody after you have sex with a chick on the reg
Reg cock is Blood on the penis
by Vandersmelt February 01, 2010