When someone in your family (i.e. sibling, child, etc.) mistakenly sends a sext meant for their partner to you in error
Kevin: Oh, David sent me a text.
Ann: Yeah, so?
Kevin: Wait... what the fuck... Are these pictures of my brother taking selfies in the mirror naked - and in Darth Vader underwear!?
Ann: What!? No, David! That's a sexterror!
1. (verb); When one consumes excessive amounts of whiskey, usually Irish, resulting in a state of utter inebriation culminating with being awoken to the realization they've erringly used the stairs as a place to defecate
2. (noun); The result in the aftermath when one uses the stairs as a place to drop a deuce often leaving an unpleasant stain
Kev: You're not going to fucking believe this. I was completely annihilated last night and shit on my stairs. I thought it was the toilet! I think I was sleepwalking.
Chris: Bro that's an explosive case of the SOTS. You're fucking filthy.