fleepae Share definition Flag A form of a word, such as Leanna. It originated from the hit Warner-Brother movie Liar Liar, lou-pay, the nanny, which eventually turned into fleepae Fleepae, you are such a loser. fleepae by Stephanie May 25, 2003 0 0 Get merch Get the fleepae mug. Buy Now — $32.95 See more merch