Its arse.
A hippocratic hypocrite.
To spruce things up a bit.
A baby hit by a snow blower
wife: I don't like spiders me: Ooooh *grabs newspaper* mother-in-law leaving I don't have to take this
Shake it off
The doctor said, surprised. "I don't know, it started with a boil on my arse." the frog said.
It's rear end!