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2.
stt
Safe to talk.

Used when parents or unsavory authority-types might be around.
personuno: hey, stt?
persondeux: yeah
personuno: k, so neway he had this needledick...
by dah duh dah April 18, 2005
 
1.
STT
STT stands for stop to text and it is when someone pulls over on the side of the road to send a text message.
I had to STT to tell Ramone about the Strawberry Shortcake I gave the girl from the club last night.
by M!$t3rR!0 May 16, 2010