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To cancel a previously agreed night out. One can be a kaffler, well known for kaffling repeatedly.
Where's Dave?

He's kaffled, the big girl.
by raelor October 01, 2008
To fall asleep suddenly. Can be drunk, stoned or just plain tired.
Can be a 'kaffler' which is where you are a person who 'kaffles' a lot.
1. My god Sarah is such a Kaffler!
2. I'm going home to fully kaffle out.
by Me alrite! November 27, 2006