A combination of the words "sweet" and "creepy". Can be used to describe a person, place, or thing. While it generally carries a positive connotation, there is the explicit understanding that part of what you're trying to describe is just...odd.
Admiral: "Did you see that wedding video in a club where they threw out Hawaiian leis instead of flowers?"
adj. A combination of creepy and sweet. Often used to describe ex-boy/girlfriends, it is used to describe when another party is being undeniably sweet, but also extraordinarily creepy.
“It was sweet of the my old elementary teacher to save my artwork and give it to me, but kind of creepy that he brought it to me 20 years later as his local bartender. I guess you could call it sweepy.”