not wanting to crap in the pub's gnarly toilet, drew knew his wiggling ass crayon would make quite a masterpiece as he waddled his way home
the resultant fecal protrusion as result of fighting off the imminent need to defecate, that has moved beyond the [turtle head] stage
"not wanting to crap in the pub's gnarly toilet, drew knew his wiggling ass crayon would make quite a masterpiece as he waddled his way home" What is the definition of "ass crayon"?