Defined as running an isolation set on a girl earlier in occurrence than anticipated or necessary. Usually involves the act of trapping the desired hoe in a particular spot or corner of sed establishment for an exorbitant amount of time.
See also: "Pulling a Kennedy"
Everyone know you only go ISO late in the 4th, what is this kid doing he's been talking to the same girl over there and hasn't moved for 4 hours, and its only midnight!
Look at the dude over there premature isolating, he has had that cutie pinned down for hours and hasn't talked to anyone else...what a fag.
OMG look at this freaking Kennedy running premature isolation likes it his job, that poor poor girl has been stuck in the corner of the bar all night!