A sickening-sweet term of endearment, as used back & forth by Jerry Seinfeld and his girlfriend. Usage of this sugar-laiden nickname can bring ones friends near to the point of vomit.
Couples who are constantly feeling the need to be touching, holding hands, kissing, and calling eachother pet names like shmoopy, as if they are forever caught in the state of being a brand new couple that is madly in love. It's from seinfeld
That is the shmoopiest couple I have ever seen. They are always eskimo kissing in front of everyone and it's awkward as hell.