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right your mother right 

Chinese slang meaning "I strongly disagree".

Similarly you can apply this - your mother - pattern to almost all words. Parents may say "Go to bed. Play your mother play!" to express that they are seriously annoyed by the kid's staying late playing video games.
Alice: "He is right. Trump is indeed a gentleman."

Bob: "Right your mother right."

Your Mother's Crib 

A reference to the residential area belonging to one's mother used in a disrespectful manner. Often used to dismiss an arbitrary question resulting in frustration and embarrassment by the inquiring party.
Brian: What is the answer to number 12?
Jake: Your mother's crib. Got em

Youchother

“I’m so glad that we finally got to meet youchother!”
Are you five.”
Youchother by Cowboy_ December 31, 2021

Your Mother was a Hamster and your Father Smelled of Elderberries

This is the greatest insult ever uttered in the history of mankind. It has been said that if a individual says this to another, they will be succumbed to the overwhelming Dankness they have experienced. Their bones will start to get weak, they will drop to their knees and beg for mercy. BUT! They will will be no forgiveness for those whose mother is a hamster and their father smells of elderberries! They will be forced to eat the unholy Lima Soy as punishment for their grave sin.
Your Mother was a Hamster and your Father smelled of Elderberries, enough said

clean as your mother's reputation

Basically, this term means that you can't get something any cleaner (or purer) than it is. It's also meant as a compliment by saying that somebody's mother is not a skanky whore or streetwalker. This term appeared in the young adult edition of the novel adaptation of the 1979 sci-fi thriller"Alien".
George the janitor tidied up the restroom so well it's not simply spic and span, it's as clean as your mother's reputation.

Pornography starring your mother 

pornography with your mother in it, either biological or adoptive.
Indeed, and now he's here to fuck us! So listen up boy, or pornography starring your mother will be the second worst thing that happens to you today
-spy