lisp muscle Share definition Flag the muscle up a gay mans ass that is hit while butt fucking causing the gay man to speak with a lisp ssssshit, you hit my lisp muscle (lisssssp mussssscle) you ssssstud. lisp muscle by to much think time April 17, 2007 0 0 Get merch Get the lisp muscle mug. Buy Now — $32.95 See more merch