get the stuffing knocked out of (one)

1. To suffer an extremely violent physical assault. The unfortunate burglar got the stuffing knocked out of him when he tried to rob the house of an ex-Navy Seal. You're going to end up getting the stuffing knocked out of you if you don't stop running your mouth like that! You'd better tread carefully or you're going to get the stuffing knocked out of you.

2. To suffer a decisive defeat; to be completely dominated in some competition. The final score was 17–1? Wow, they really got the stuffing knocked out of them! I was doing pretty well for most of the tournament, but I got the stuffing knocked out of me in the semifinals. My favorite team is really banged up, so I don't expect them to go far in the playoffs—I just hope they don't get the stuffing knocked out of them!