Top definition
Thsie - adv.

The Rapidly growing affirmation, thsie, was originated in nor*cal, and simply means 'yes'. It can be used in many different contexts, mainly as a joking playful affirmation.
Rumors have it, this word has spread down the coast to Santa Barbara, and even down to LA.
Vince: yo dude, look at the gazongas on that girl, would you?

Jon: THSIE!
by 707gate September 28, 2010
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