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1.
a term of endearment for a cute creature. Particularly for a cuddly pet or a little baby, but can cover the entire range of adorable, sweet creatures, wild and domestic, even humans.
Awww, look at the little shubba.

Those little shubbas, they're adorable.

Oh baby, whaddya little shubba you are.
by JakeinthedirtyD March 05, 2008
 
2.
A negative or positive word;exclaimation; to use when no other response comes to mind. (Adj- Shubby)
Person 1: Hey you got a booger on your shirt!
Person 2: "SHUBBA! Where????"

"Stop being Shubby ya lil biach"

"Shubba dubba do! And Shubba dubba dittle"
by MaimaJama January 23, 2004