Pre-weekend "whoopee!"

• Pre-weekend shout
• Worker's fifth-day cry
• "What a tiring week I've had"
• Working stiff's relieved cry
• Payday cry, briefly
• Nine-to-fiver's "Aah!"
• "Can't wait to go home!"
• Cry at a happy hour, maybe
• Fri. refrain?

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).