Definitions by SomeonesOSOP

OSOP 

An acronym for Offspring's Significant Other's Parent

Rather than saying, "My daughter's boyfriend's Dad and I are going to hit the golf course," you could say, "I'm going golfing with my OSOP." or "If my son ever breaks up with his girlfriend, I'm totally going to nail my OSOP."

OSOP by SomeonesOSOP February 16, 2024