Shit Silencer
A strip of toilet paper (usually doubled up - 4 squares folded over to make 2 thick squares) which is laid over the water at the bottom of the toilet bowl. This way, if your toilet is in close proximity to other people or your house is quiet when you're taking a shit and don't want people to hear the splash of your logs hitting the water, the shit silencer cures this issue!
Person 1: Man I took a massive shit last night
Person 2: That must have woken your family up
Person 1: Nah, I used a shit silencer!
Person 2: Ah good job
Person 2: That must have woken your family up
Person 1: Nah, I used a shit silencer!
Person 2: Ah good job