1) someone who has no input
2) of inferior intelligence
3) is boring
John: ......I don't know man my mom wants me to walk the cat.
Tony: Buddy your a fucking YOGURT!
Tony: Hey babe how bout me, you, my malibu ;)
Mel: I gotta watch jersey shore tonight, sorry.
Tony (to Vito): That girls a fucking yogurt, she decided to watch guidos on t.v. instead of getting with a real one.
B. Some use this term to mean "The act of doing something you don't like" (i.e. "put up with"), though this varies from the original meaning of the term since there is no intention to ever enjoy the action.
I never liked tomatoes, but after yogurting them for a few months, I now like them on my melted cheese sandwiches.
Eugena yogurted eating tomatoes.
Dating Charlie is ok, so I'll yogurt him until something better comes along.