Mr. Jingles
1) The opposite of having "Big Brass Balls". Being timid, a lackey, a toadie, a sniveling suck-up. Someone indecisive, incapable of having their own opinions - will always agree with whoever's teat they're currently attached to.

2) May also give themselves an overblown nickname like "Lion-o", "Dragonheart", or "Hercules", as a direct opposite of their true nature and courage.
Mr. Jingles: "Let's go out and find some women!"

Any Man: "Yeah, sure Mr. Jingles. Whenever you want to stop acting like a little mouse and talk to one without me telling you what to say."

Mr. Jingles: "Whatever you say!"