Top Definition
PLAS for short.

An awesome party exclusively for La Canada High School Seniors. It's held right before school starts in late August. Everyone wears their Senior T-shirts and gets PLAStered.

It's the first party of the year, and sets off Senior year with a great vibe of class camaraderie. It is rumored that several unexpected hook ups occur at this party.

There is also a Party Like A Second Semester Senior.
Senior 1: "Are you going to Party Like A Senior?"
Senior 2: "You mean PLAS? Hell yeah I'm going! VIVVAAA!"
Senior 1: "Cool. I heard it's going to be awesome. Remember that it's only for LCHS seniors. Don't be dope inviting those CV kids..."
by seniorsrock February 06, 2011
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