The word 'shpappy' means a state of utter happiness, but with a twist. When a person is shpappy their happiness is slightly overcome by spazziness.
Otis: I'm so SHPAPPY
Otis: Cos the reject gooseblob left me alone and finally took the hint that I don't like her. AT ALL.
Otis: I KNOW!!! *dances*
Dorita: Whats your secret??
Otis: *taps nose* thats for me to know and for you to find out.
Dennis: You raped her didn't you?
Otis: *shifty eyes* No...
Dorita: LIAR!!! Gd one tho...