Verb: to melvin someone is to stick your finger in their bum, before which you should 'melvin' and then make a rasping noise with your tongue (i.e. blow a raspberry) as you insert your finger. To melvin your opponent automatically hands you the victory in any fight or physical contest.
'I was having a good grapple with Mo the other day, but then he melvinned me and i lost'
'I'm going to melvin andy to get back at him for throwing that water over me'
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