Ploopy can mean anything that is bad, it is usually but not always associated with the words.. Bad, Sad, Ugly, Fat, Stupid, Strange, etc.
Antonym of Blooby
1) Eww.. After he looks so ploopy cause he gained 10 pounds
2) Why are you so ploopy to him?
3) You make me look like ploop
4) Your looking Ploopy today =