Top Definition
Acronym: Thread With Extraordinary Survival Instinct Syndrome.

Typically applies to threads in bulletin-boards/forums that are active over an unusually long period of time.
Example: This Happy Birthday thread is just another to be affected by TWESIS! Few birthday threads last this long!
#twesis #thread with extraordinary survival instinct syndrome #thread #with #extraordinary #survival #instinct #syndrome
von Sid! 15. November 2005
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