I was at the Cocksmack concert and got arrested for "public nudity". AND The people who run Urban Dictionary are a bunch of cocksmackers for not reconizing that Cocksmack (the band) is the greatest ever and refuse to list them on here.
Back during the days of wooden naval ships and pirate raids, the British ran a very harsh crew aboard their ships....officers would randomly come up behind sailors and whack them across the head with a thick piece of rope dipped in in this thick coating of whatever it was and it made it hard as rock...so they called it the boatsmans cock...hence cocksmack