An unoriginal term every twelve year old uses nowadays because they think they're the top shit and they have nothing better to say.
Jim was killed by Dan
Jim: Wow you're so bad!!
Dan: lol salty lmao amirite????
Common term used in online games like CS:GO. Usually used when one of your teammate/s can't accept their mistake or losing.
Dude, Don't be salty that was last 3 rounds ago.
Being salty is when you've got a foot up your ass and you can't quite get it out.
Damn, Makenzie was being hella salty at the beach the other day
someone being upset, pissed, or mad.
He was salty because she kicked him in the balls