Soupy

In sense of speech. One who talks soupy is being mildly flirtatious, almost drool falling off their words, but trying to hide it.

Boy: “Yeah I just got a dog. I’ll show you.”
Girl: “AWWWWWW!! I love dogs too. Blah blah blah blah blah blah blah. Yeah dogs! We’re so alike. Do you want my number?”
Boy to his friend: “Damn she acts soupy...”