(pronounced Ay-ow-es) Acryonm for "Annoy Older Sibling Syndrome", references a younger sibling's inate ability (or self-destructive NEED) to annoy their older sibling.
I can't help it! I need to annoy Raph! I have AOSS!
You better tone that AOSS down before I punch you in your facehole!
You better tone that AOSS down before I punch you in your facehole!
by MicaTurtle1 April 16, 2011
Get the AOSSmug.