The act of flushing the toilet in order to cover up some noises you´d rather not have others hear, similar to a mafia boss turning up the radio to deafening levels while discussing the latest plans to snuff police cheif.
(Said to fellow in stall next to you) "Dude, you could have given us a camoflush, that was totally disgusting"
The act of flushing the toilet to muffle out the sound of you fucking your friend's wife in the bathroom of the hotel room you and your wife are sharing with him and his wife, usually occurs after a long night of drinking. Sometimes requires multiple flushes. Often combined with one of the many forms of blumpkin.
I invented the camoflush last weekend whilst banging my buddie's wife in the bathroom at the holiday inn express, while he and my wife were both asleep in the other room. So basically I saved some duckets on the hotel room and also scored some strange.