Thanks for Fri

• Worker's weekly exclamation
• "What a relief!" relative
• Happy hour shout, sometimes
• Office whoop
• End-of-the-week exclamation: Abbr
• Letters exchanged by employees?
• Pre-weekend exclamation
• ''The weekend's almost here!''

Wikipedia Word definitions in Wikipedia
Tgif (pronounced t-g-i-f) is an Xlib based interactive 2-D drawing tool under X11 for Unix , available on Linux and most Unix and Unix-like platforms. It was developed since 1990 and is free software released under the QPL license. Tgif is one of the few ...

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
also T.G.I.F. , by 1946, slang abbreviation of "Thank God (or "goodness"), it's Friday" (end of the work week).