An STD often contracted by male perma-losers who have sexual contact with crazy ex-sorority girls.
Symptoms include extreme amounts of losing at life, lots of FML moments, shaking, crying to oneself, and have ones dick melt off.
To avoid contracting Saunderia one should stay away from girls who get really drunk before concerts and pass out in the parking lot, girls who try to sleep with you the moment they meet you, and girls who admit to falling in love with you after one week of sleeping together.
O man, David hooked up with Trista? He definitely has Saunderia!
Don't hook up with that girl, shes crazy and just dropped out of her sorority; she probably has Saunderia.