A bag full of motherfuckers
A heavy bag, like a burlap or denim one, packed with 3 or more motherfuckers and tied tight with rope so they can't escape or scream.
I opened the bag and 4 motherfuckers jumped out and bit me.
The bag was so full, it looked like it was about to burst from all the swearing.
He threw the bag at me and it hit me in the face like a curse.