PSND
Post-Surf Nasal Drip. The sensation of water coming out of one's nose while bending over beginning 20-30 minutes after a session of heavy surfing.
Guy 1: "Brah! i leaned over to kiss my girlfriend after surfing, and i PSND'd all over her shirt!"
Guy 2: "Gnarly bro!"
Guy 2: "Gnarly bro!"