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1) To violently smack someone in the back of the head, typically a female smacking a male.

2) To waddle and yak (talk) at the same time.

3) 'What i did to/with your mom last night.'
1) I'm going to yaddel you!

2) My english teacher is such a cow, she spent the entire period yaddeling.

3) Yeah, i yaddeled her!
by slurpeeaddict27 September 09, 2007