A relationship in which one of the included members is in the 'whipped' status, normally the male figure. The infected member is inclined to always take part in agreeing with the other member, no matter how horrid or unbecoming the situation. Normally results in an ownage or rip by regular friends or acquaintances.
"Dude, Matt is so relationwhipped by his girl Jessi. She said she wanted to go to a party that consisted of only her fat girlfriends and dudes he hates and he said 'Yeah babe, I'd love that!' Really, man?"