1.) To strike someone in the mouth with a fist.
2.) To ejaculate "knuckle children" (semen) onto a sandwich and then feed it to some unknowing individual.
1.) Jimmy was running his fucking mouth so I gave him a knuckle sandwich.
2.) Jimmy was running his fucking mouth so I gave him a knuckle sandwich.
You see either way its about the same. In example number one you have punched him in his mouth and example two you have made him ingest your hot and salty jizz.
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