It is not just an expression.

Yes, There were some foolish ones who did.

I seen it back in the early 70s with some of the guys I knew and I just happened to be at a few particular parties where there were no rules.

There are some who do it these days, so I am told by my son who attends a local university.

"They call me the Bandit without any Pants."

BD the GOMOTB(Grumpy Old Man of the Board.....Yeah thats me! whatcha gonna do about it?)

"Weasles! They're not just for breakfast anymore!"