The word "Reddy" is short for calling a man or woman a redhead. It's also for people who are too lazy to say "redhead" or find it fun to shorten words in general.
Damn! Christina Hendricks is one hot Reddy!
The only reason I watched the X-Files for all these years was because of Scully. She was a real cute Reddy!
Conan O'Brien is the funniest Reddy of all-time! Jay Leno is a hack!