A penis with a notably large girth.
Bob's phat cock is wider than it is long.
by Phat Phallus September 26, 2013
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1. when you have an abnormally sized rooster
2. when you got one thick-ass dick, bitch
horny woman: Hey, you got a Phat Cock?
horny guy: Hell yeah, want to sex?
Horny woman: yum.
by Jeffery Deadstein May 6, 2020
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