pink boxing 

The process of inserting a fist up someone's vagina rectum to achieve sexual stimulation. Often used by escorts as slang.

"She says she really likes pink boxing."

pink boxing by Make It Feel Good December 12, 2007

pink boxing glove 

When you’re fisting your partner and it goes horribly wrong, resulting in your partner’s rectum being pulled out and remaining on your hand like a glove.

“I got a bit too rough my partner and ended up with a pink boxing glove.”

pink boxing glove by jubbajubba October 1, 2018