To eat sushi off the naked body of your partner.
Hey do you want to grab dinner tonight? Sorry I can't. I'm going to a British buffet.
An individual that unwittingly has sexual relations with a sibling.
Can't believe Dan pulled a clumkt last week at the party. Who knew he had a half-brother from Ecuador.
An individual that practices incest.
George you're such a clumkt, probably banged your own sister.