Beetus Zebra
1.Something bad that always is looming over you, like it or not (Can be anything, not only the beetus.) , A sinking bad feeling, a pessimist.
1:Wow I know i am going to fail this test!
2: Don't let that Beetus Zebra get at you!
Or
1: Wow (Name) is a real Beetus Zebra!
2: Don't let that Beetus Zebra get at you!
Or
1: Wow (Name) is a real Beetus Zebra!