To take a shit.
To "ugle" is to take a dump; to be "ugling" is the action of taking that dumb. An ugle can also be a noun signifying the poop itself. If you need to take a shit, then you are feeling ugly (uglish is the incorrect terminology)
Synonyms for Ugle
On this page, you will find 30 slang terms related to ugling. Some of the top words include: squinch, shiZni, dropping the cosby kids off at the pool, sheesta, hibobadoble, and 25 more.