When a guy is so overweight, that the fat from his abdomen starts to seep down into his scrotum, where there is normally no fat present.
Girl A: Soooo that guy you went home with last night... was he a good lay?
Girl B: He would have been, if he wasn't so ball fat.
Girl B: He would have been, if he wasn't so ball fat.
by Lil_Iltis April 12, 2011
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