Sexually Transmitted Timeline Disease, a reference to the new and unsatisfactory Facebook format.
"Damn it, they changed my Facebook profile to the STTD!"
by BlueBrother April 19, 2012
A sttds is a sexually transmitted disease contracted from a tinder hookup thus called a sexually transmitted tinder disease
She probably has sttd's you should probably swipe left.
by a_tron September 02, 2014
Sexually Transmitted Technology Disease

A computer virus acquired from watching online porn.
My laptop caught an S.T.T.D.
by 654lkjahsdlkh May 04, 2011

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