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1.
"That's so embarrassing for you." Used to belittle your friends when they 1. make a mistake 2. have an exceptionally lame Facebook status or tweet.

Variations: TSEFme, TSEFher, etc.
"You peed on his couch?! TSEFY."

Jon's Facebook status: Jamming to Nickelback all day.
Jen's comment: TSEFY. Big time.
by YEM 802 September 28, 2011