A work for a really good looking girl, somebody you would really like to hump are humpalicious.
Wow she's a bit humpalicious
Someone that you find extremely attractive. A person you want to "hump" is humpalicious. You call a person humpalicious that you think is hot.
Girl 1: "Oh My God!!! That guy over there is really hot!!!"
Girl 2: "Yea!! He is so humpalicious!!!"