When you take a compliment given to you by a girl and agree with it but take it as an understatment so you blow out of way out of proportion.
If you get the reaction you want it is smooth, however if you get the opposite reaction it is salty
Guy says: "Ya there real expensive"
Girl says "Ok" and walks away quickly
Friend says to guy: That was so salty
I look over my friend's shoulder to see him sending a text that says "I'm in chem class right now" The reply is "Shouldn't you been paying attention right now?" His reply, "No, I don't need to pay attention cuz I'm really smart." She replys with the dismiss of "cool." I said, "wow dude, that was salty.
Don't bother me; I'm feeling a bit salty.