McDeffy

slang term for yes; sure; definitely.

"Yo man do you wanna go to that party later?"
"McDeffy!!!"

by Randy Kandy August 25, 2009

mcduffy

Ice Cream of any flavor smudged between 2 rather large size cookies of any flavor or mixtures.

Jimbo looked East as the wind blew gently acrossed his brow, tell him yellow aint the color, "you all sell them ice cream cookies?", "ah yes, Mcduffy's, isle 4"

by Damien Williams September 12, 2008

McDuffy

The part of your golf game that is giving you the most problems or the mental part of the game that you need to get over in order to get to the next level.

Using my driver to hit the ball far and straight is my McDuffy in golf!!

by Chieu September 6, 2008