|Synonyms:||At then they had sex|
|See also:||RST, NC-17|
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ATTHS is an abbreviation for the term "and then they had sex" in the X-Files fandom often posted as reply to a screencap or gif from the show because MSR shippers used to regularly post fill in the blank/ post-episode fan fiction where Mulder and Scully resolve their sexual tension.
- Fan Fictions tagged as atths on Archive Of Our Own
- definition at urban dictionary
- TXF - ATTHS Fanvid by BostonUrMyHome