Thorned up: like you're thirsty and horny, a state of sexual arousal that just won't go away, and you're all worked up and hot.
"he was so thorned up he jacked off like 5 times today"
"Fuck man, im hella thorned up right now"
"He's been all thorned up acting hella thirsty"
"i've been hard all day, damn I'm feelin thorned up"