A back handed smack to the scrotum of another man (also known as "sacking"). Often resulting in a "tag war" where two men will bag tag each other multiple times in an effort to take take one's adversary by surprise. A tag war can be ended with a sacking/tagging truss.
Guy 1: What's wrong dude?
Guy 2: My sack is black and blue from the tag war between me and my friend.
Guy 1: Just make a sacking truss and you can stop getting "Bag Tagged"
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