LMFAOSHINP Share definition Flag Rarley used phrase originating in "TEXT TALK". Means Laughing My Ass Off So Fucking Hard I Nearly Pooed Omg "LMFAOSHINP" LMFAOSHINP by Hamill lad May 19, 2010 0 0 Get merch Get the LMFAOSHINP mug. Buy Now — $32.95 See more merch