butt cork 

I hate to say it, but it's just the thing on the end of a fly rod that covers the end, and is made of cork. You thought it was going be a hell of a lot juicier, didn't you.

This fly rod's butt cork is so dried out I might as well pull it off and put some rubber on there.

butt cork by KenFr December 22, 2008

I'll put a cork in your butt hole

This is a phrase/insult that can be used when mad at another person mostly used when someone is farting too much. And you can't handle it so you yell at them and usually, they're weirded out so they stuff or you can do the basic thing which is just hit them.

Example:1

I got in trouble from my parents because, when my brother would not stop farting I yell I'll put a cork in your butt hole

Example: 2
Person 1 : *fart*
Person 2: eww

Person 1: *fart* *fart**FART*
Person2: I'll put a cork in your but hole!!!!!!!

I'll put a cork in your butt hole by SoldMyMomForPineapples February 20, 2019