A bandit that eats clams. Also known as a lesbian.
The Red Room is full of clam bandits on ladies night.
(noun) - A person or persons who do not do their washing up and leave the kitchen in an awful mould-infested state. Someone who is generally a messy bugger.
"Oh Laura, you haven't done your washing up again! You filthy Clam Bandit!...go to bed!"
(noun) A person who hits on/sleeps with your girlfriend/wife/girl you're in the middle of making moves on or that you're extremely interested in.
"Dude, I was talking to this girl and I really like her and my friend josh just came up and asked her out!, he's a total clam bandit!"