Similar to a mental defect, but applies to intimate relationships, particularly when one party takes subtle steps to sabotage a relationship.
Tom: I thought you two were getting along great until she flipped shit over you ordering fettuccine instead of linguine and then insisted on taking everything to go for leftovers.
Jerry: Yeah, that girl has a mental relationship defect.
Jerry: Yeah, that girl has a mental relationship defect.
by KM and KM March 8, 2019