When a friend drinks all the beer, steals your cozie, pukes on the floor, passes out, and then is gone before clean up in the morning, he is a sleach.
by Aria Fugazi June 7, 2015
Unknown disease that attacks the body’s digestive system resulting in uncontrollable Flatulence. In some instances flatulence can reach up to a 14 on the Flatulence shmisshomorshin scale which actually only ranges from 1-10. This disease is now know as the SLEACH, slang used “sleach fart”.
by fire fly(2008) December 11, 2008