I came across this phrase in the first Chapter of The Long Goodbye (written by Raymond Chandler). Is it an idiom? Or something indecent? Here is the context:
"Sure," he said cynically. "Why waste it on a lush? Them curves and all."
"You know him?"
"I heard the dame call him Terry. Otherwise I don't know him from a cow's caboose. But I only been here two weeks."