Best definition
Canadian slang for coffee.Any caffeinated drink can also be called a ‘yoff’.

Person A: Hey guys I’m feelin’ pretty tired

Person B: How aboot a couple Yoffs for the boys?

Person C: Sounds good!

Person A: just what I need!

Yoff: define #2
The playoffs. Any post season sporting even
Hey man, I heard you made the yoffs today! You better win!
Yoff: define #3
Your Own Fucking Fault.
When working in the ER and someone comes in with with an injury due to stupidity, it’s a YOFF.