Acronym for "Thank God it's Wednesday." In countries like Saudi Arabia, it is equivalent to <a href="/define.php?term=TGIF">TGIF</a>; the work week ends on Wednesday there.
TGIW! I wanna go party in Bahrain so bad this weekend.
by Freddy ByKnockulars September 2, 2009
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Thank God It's Wednesday. Drinking Kitty-Corner from Domino's on Milwaukee Eastside
"Yo, Ryan. Are we going for a TGIW tonight?"

"Yeah, flip cup hump day"
by Oakland Raider September 7, 2011
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(acronym) Thank God It's Wednesday. Similar to TGIF.

In the geek and nerd community it references the prevalence of Wednesday as the day that new issues of weekly comic books appear in stores.
"TGIW! I can't wait to get to the comic book store and pick up the new issue of 'She-Hulk.'"

In Popular Culture: On "The Big Bang Theory," Sheldon, Leonard, Raj, and Howard go to the comic book store every Wednesday for what Sheldon calls "new comic book night."
by NerdHammer March 26, 2015
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