mother mucker

When you want to call someone a mother fucker, but don't want to get in trouble.

Origin:
In Texas Hold'em, you can fold your hand and throw your cards into the "muck". Now imagine someone does that to a mom. Pretty messed up.

"Hey why do I not get a raise this year? I'm outta here you mother mucker"

"Oh this mother mucker just cut in front of me."

flush your mom

When someone falsely claims he has a flush in card games like Texas Hold'em or Omaha, you can say this to his face.

A flush is when you have 5 cards of the same suit. Not 4.

And no, 5 red cards with diamonds mixed with hearts don't make a flush.

"What chu got?"
"I got a flush.(show hand)"
"Flush your mom! You only have 4 diamonds you dumbass."