When one of your friends is too scared to go along with the simplest of things because they believe that they're going to get caught or get in trouble. It is believed to have originated from the Roman times when a gladiator called Shermwood wanted to back out of a fight to the death so the upset masses, who wanted to see a bloodbath, started calling anything similar to that as 'Sherming out'.

A person with an outwardly dominant, masculine, or aggressive personality, but who also enthusiastically takes on the submissive or "bottom" role in the bedroom.