It's literally just nothing
Yo bro what you have for dinner last night?
Oh I had an Ethiopian Surprise
A “Hawaiian Surprise” is when you pause sexual intercourse by throwing a blanket over a girls head, in order to secretly put on a coconut bra and continue pounding without her knowing about your new wardrobe. Then when you’re ready you take the blanket off of her head, she’ll laugh, and her vagina will start to clench in and out for the ultimate “Hawaiian Surprise”
“My friend Brennen gave Zoey a Hawaiian Surprise last night.”
Any cool guy: “Really!! No way!”
An act or display of shaving only the front area of the female's nether regions. This leaves her partner with a pleasant bush as a surprise.
Damn she was hot, but when I spread her legs I got a surprise bush