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1.
When you position yourself "the wrong way around" on a toilet and defecate with a view to the turd remaining on the porcelain shelf above the water. Most would then leave the toilet unflushed
The hotel manger was rude to me so I left a reverser for him to sort out.
by The Gizzle February 28, 2014
 
2.
Taking the Spock Shocker and curling down the middle finger such as to insert one finger into the vaginal opening and two into the anal opening.
Trish likes it when I give her the reverser.
by Anonymous October 22, 2003