Dumbiscuous
When you sleep with people in a stupid manner or when you act incredibly dumb about your sex life.
Guy 1: Man, last night I was so drunk. I thought that chick I slept with was Larry's sister. But guess what?
Guy 2: What? It was actually Larry?
Guy 1: No it was my dog.
Guy 2: That was pretty dumbiscuous.
Guy 2: What? It was actually Larry?
Guy 1: No it was my dog.
Guy 2: That was pretty dumbiscuous.