Clyde

Someone who likes to curse a lot and tell inappropriate jokes (usually sex jokes) when given the chance during conversations.

Guy1: "How old is your mom again?"
Guy2: "I think she's 69 years old."
Guy1: "Ooooh! Still fuckable and whose age is the same number as my favorite sex position."
Guy2: "God! You're disgusting, you're such a "Clyde"."