Another Man's Time 

When you marry or hook up in an instant family and raise another man's child.

"My friend Jessica just got divorced. You want her?"
"No man, she's got two kids with two different baby daddies."
"What's wrong with that?"
"I don't want to do Another Man's Time."

Another Man's Time by Sazzry February 3, 2023

Another Man's Trash 

Wearing of a condom that has been previously used and ejaculated in.

After Tom, Jess and Shawn, Matthew B. wore another man's trash for his turn in the gang bang.

Another Man's Trash by SpiritHound May 26, 2017

another man's pudding 

having sex with someone else's partner

I will never eat another man's pudding

another man's pudding by Uz- Warrington July 13, 2021

Never rub another man's rhubarb! 

Yes, its from the first Batman movie in 1989. It means stay the fuck away from my girl. It is part of the code. No friend of mine is allowed to talk to or hang out alone with my girlfriend unless they want the wrath unleashed upon them.

"What the fuck man? You took her out to dinner last night? Never rub another man's rhubarb."

Never rub another man's rhubarb! by I'm Batman July 31, 2005

Never rub another man's rhubarb! 

Told to Bruce Wayne by the Joker. The Joker was refering to his relationship with Vicki Vale

"Never rub another man's rhubarb!"- The Joker(Jack Nicholson)

Never rub another man's rhubarb! by Bruce Lee lives April 7, 2004

One Man's LOL is another Man's WTF? 

A simile/idiom similar in meaning to "one man's trash is another man's treasure" only, in this case, it means that what is funny to one person may be offensive to someone else.

Tom: "Man, I told this hilarious joke last night. Everyone laughed but Bob. He was a douche and said the joke was offensive."

Dick: "Don't worry about it, dude. One man's LOL is another man's WTF?"

One Man's LOL is another Man's WTF? by songwriterz October 17, 2012

one man's treasure is another man's trash 

What one sees as valuable, another would view as garbage or junk. Reversed form of "One man's trash is another man's treasure".

Peter: OMG, you have the Johnny Seven OMA Gun! That was the coolest toy ever as a kid.

John: Throw it out man. That thing is worthless, I kept losing all the ammo.

Peter: I guess one man's treasure is another man's trash.

one man's treasure is another man's trash by KnightofNerdom August 20, 2019