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1.
an expression denoting something pleasurable, awesome, attractive, or good.
"Dude, that girl is totally checking you out." "....sweet balls!"
by Britton B. May 02, 2007
 
2.
The Opposite of shitballs. When something goes well or better than expected
Sweetballs!! I just found five bucks on the ground!

by Smokey J October 23, 2007