shit mummy

When someone likes to get shit on in sex (insanely gross) the person getting shat upon is the shit mummy.

Sarah was John's shit mummy.

Mummy Shit

After taking a painful shit you end up walking like a mummy and/or zombie in order to not upset your asshole.

Wife: Are you okay dear?

Typical guy/husband: Yeah but I just took a big Mummy Shit and it hurts so bad!

Wife: Pig.