ah'sh!!! 

when you want to say "ah shit" but there is someone of a young age around you shorten it to this.

Jimmy: I got an F in science.
Dad: Ah'sh!!!

ah'sh!!! by Rydogg November 6, 2004

Ahsh 

When you're trying to say 'Ah Shit' but don't want to cuss for some reason.

Teacher: You failed.
Student: Ahsh

Person 1: I fucked your sister.
Person 2: Ahsh that's gross!

Ahsh, I just got 2 ounces of weed!

Ahsh by Jurissy October 15, 2011