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1.
When one (usually a male) dresses up to go out looking suave and devinare (not a shirt and sum slacks i mean---- shoes shined, pants pressed, shirt iron, clean socks jacket and a hat
Yo, i got this new girl, she so up class its a bitch cuz i gotta put on the ritz for her, but as long as i get her sweet ass.
by alchemist metalhead January 01, 2005
 
2.
A old song remixed in the 80's. A pretty good song.
"Now, if you're blue
And you don't know where to go to
Why don't you go where fashion sits
Puttin' on the ritz."
by rapsux February 28, 2005
 
3.
A slang way of saying "dressing fancy"
Popularized by Fred Astaire song

"If you're blue and you don't know where to go to
Why don't you go where fashion sits,

Puttin' on the ritz"
by bellalogic August 08, 2014