Top definition
The lengthwise measure of one's scrotum, generally from the base of the penis to the start of the taint.
"Whoa dude, check out the scrotal span on that guy! I wish my balls were that huge."

-or-

"Haha, look at ol' tiny-balls over there. I bet you can't even measure his scrotal span with a microscope!"
by Penis Inspektor February 12, 2008
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