When Senator Craig was busted for transmitting signals for gay sex in a public bathroom (by tapping his toe next to the adjacent stall), he claimed that he always spread his legs when he sat on the toilet to keep his pants up. Therefore, "craigroom" means having enough space on the toilet to comfortably spread your legs.
"I like visiting your mother, but hate using her bathroom. There just isn't enough craigroom."
af MITJack 27. september 2007