If you go to an O'Brien's Sandwich Bar in Dublin (or elsewhere) you can buy a Crambo. Its a sort of a club sandwich (or 'sambo' in Dublin slang) which I presume is so called because it is crammed with food.

Total thread drift, but the word was familiar to me. I expect to get a free Crambo on my next visit to O'Brien's as reward for this blatant piece of advertising.