Irish jellyfish

Come on, everybody, sing along!!!

Oh, I'm looking over a four-leaf jelly
that I overstepped before.
One leaf is sunshine, the second is rain,
Third is the jellies that grow in the bay.
No need explaining, the one here remaining
Is something that I abhor
Oh, I'm looking over a four-leaf jelly
that I overstepped before.

(Apologies to the late Mort Dixon)