g belt - A chain you wear to keep your legwear from falling down, or

A chain you wear to keep your legwear from falling down, or else you’re doomed

If my g belt breaks, I’m doomed. I’ll have no legwear left.

I didn’t wear my g belt and now I’m doomed. My legwear is free.

I’m not going to be doomed. I’ve got my g belt on.