This is a verb that also has a noun version - fleaver.
A fleaver is that annoying person that frequently sits near you, talks about something with you, farts (without you knowing) and leaves.
A fleaver will most likely deny responsibility for the fart if accused.
(Three friends are talking and one of them says that he must leave or his wife will kill him. However, little do the other two know, that third friend has just farted.)
One of first two friends: oh. oh man that's rank. I think jim just fleaved!!