Choose from brands such as...
4) Irish spring ect.
Put the bar of soap in your tube sock. Then you legit beat the fuck out someone or someones chick with the bar of soap in the sock. Several swings of the soap filled sock to the body of who your beating means they are having a soap party!
"Bro john doe's new girlfriend told my chick I was cheating on her with my client thats married and lives in LA.....Bitch needs a soap party!"
"He hit up my boys chick on blackberry messanger trying to spit game behind his back.....garinz next time we see him, SOAP PARTY!"