HAAAAAAAAAAAAAAAAAAAA
The sound you make when you get a giant meaty thing up your backside while trying to be cool.
My friend let out a HAAAAAAAAAAAA when I stuck a mop up his pants.
He yelled HAAAAAAAAAAAA when I slipped a hot dog in his pants during lunch.
She let out a HAAAAAAAAAAAA when I pulled a sock full of glitter up her back.