A term used to describe a shit. Originated in Scotland and popularised in Perth, Western Australia. A term often heard in West Perth and City Beach.

A kid who:
Hates his little sister
wears a backwards hat
plays baseball
his neighbor is a senior citizen who hates him
watch ninja turtles (hence the name because ninja tutles got caught in sludge)

A gay term for when a male and a male are having sex and you're on the bottom, and getting the other male to slide his cum into your ass.

A lady of loose morals named due to the amount of sludge within her boundaries.