yrros
The word "sorry" backwards, used almost exclusively by crazy people trying to express their apologies.
Dude 1: Hey after you left I noticed you drank all my beer.
Dude 2: yrros, i saw ytsriht
Dude 1: What???
Dude 2: sorry, i was thristy.
Dude 2: yrros, i saw ytsriht
Dude 1: What???
Dude 2: sorry, i was thristy.