As to prevent the clogging of a toilet. Instead of dropping your entire bowel movement and almost assuredly clogging the toilet, you "pinch and flush" and repeat.
"Excuse me, i have to go do the pinch and flush."

"She needs to do the pinch and flush like any other civilized person. Who does she think she is?
by RC Army August 6, 2007
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When doing time in any prison or county jail anywhere always remember and abide by the ‘Pinch One Flush One’ rule. The way this works: As soon as you ‘pinch one off’ HIT THAT BUTTON so your cellie doesn’t have to endure or power through your shit stink. Every time you pinch one, HIT THAT BUTTON! Actually just keep hitting that button on the first big pinch. Prison/Jail shitters usually have a ferociously powerful flush. You do your part and let the shitter do the rest. No one’s gonna jump all over you as long as you you hit that button. ALSO!!! Never use the shitter during meal times. Not sure about this? Fuck around and find out!
“Ugh! It smells like straight asshole up in here! Hey little homie, hasn’t anyone ever told you to PINCH ONE FLUSH ONE?

AND STAY HITTIN’ THAT BUTTON!!! SHIT!!!!!”
by FRISCO DAWG October 11, 2020
Get the PINCH one FLUSH one mug.
When doing time in any prison or county jail anywhere always remember and abide by the ‘Pinch One Flush One’ rule. The way this works: As soon as you ‘pinch one off’ HIT THAT BUTTON so your cellie doesn’t have to endure or power through your shit stink. Every time you pinch one, HIT THAT BUTTON! Actually just keep hitting that button on the first big pinch. Prison/Jail shitters usually have a ferociously powerful flush. You do your part and let the shitter do the rest. No one’s gonna jump all over you as long as you you hit that button. ALSO!!! Never use the shitter during meal times. Not sure about this? Fuck around and find out!
“Ugh! It smells like straight asshole up in here! Hey little homie, hasn’t anyone ever told you to PINCH ONE FLUSH ONE?

AND STAY HITTIN’ THAT BUTTON!!! SHIT!!!!!”
by FRISCO DAWG October 11, 2020
Get the PINCH one FLUSH one mug.