Top definition
a pooey bumbum; a shit-bespeckled anus; a feaces-ridden arsehole; quite literally a butt which has not been cleansed of its product. bon appetit!
"...so then, i looked down and saw that not only had she forgotten to shave, she also posessed a great big arty farty!"

"after the gym, my boyfriend smells like an arty farty"

"muuuum!! do we have more toilet paper?! i have a really arty farty!"

"the perfect recipe for an arty farty is sprouts, beans and prunes."
by homeless September 22, 2013
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