When a man has herpes along the shaft of his penis, and the herpes grow hairs, similar to a cactus budding with its prickles.
Tashawn: "Man I thought it was bad when I had herpes, but now I'm CACTUS BUDDING!!"
Joe: "Damn dawg, that's wack ass shit."
When you get herpes hut a whole lotta hairs grow all over them. Typically used to stop masturbation.
"I cant masturbate anymore because im cactus budding"
"Haha fuckin loser you got herpes"