A well-known woman that every other person on Earth seems to have fucked in some unwholesome matter at one time or another; especially on Xbox Live.
by Project 571 March 8, 2013

This meaning is used for someone who want it to put in your ass, people who most commonly use this term really want it in the ass, the mum part is a way of saying the you have sexual relations with someone mother.
Someone: What are we going to do
You: I'll Put it your ass, like i'll put in your mum
Someone: OMG yess baby
I'll Put it your ass, like i put in your mum
You: I'll Put it your ass, like i'll put in your mum
Someone: OMG yess baby
I'll Put it your ass, like i put in your mum
by Daddybby November 14, 2019

Used to reply to “your mum”. Can be used against someone else however is never actually relevant to the other persons mother.
by Ug8tar August 12, 2022

by DINGLELOID October 18, 2021

by Dislocatedpussyhole December 22, 2018

by LoonyRadish October 31, 2017
