similar to sideboob, sideball is simply the view of one side of a guy's ballsack.
holy shit, i swear to God i just saw that old guy's sideball!

WTF!?!? i thought that movie was censored, but i definitely saw some sideball!

paul enjoys looking at my sideball.
by HJMaster69 December 4, 2008
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When a drunk person is persistently looking at you out of the corner of their eye.
"Boy I could feel John sideballing me all night while I was talking to Bill, he's got to get over it!"
by BRC October 7, 2005
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To look out the corner of your eyes at someone so that they "can't tell your looking"
I changed my radiator in the parking lot of the apartment complex. Noone said anything, but alot of people were sideballing.
by Tug33 May 19, 2011
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A person's side guy; they guy they are cheating on their steady with
You: "Hey who was that guy I saw you out with the other night, that wasn't your boyfriend?"
Them: "Oh, that's my sideball"
by buffalo ave May 25, 2022
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nice, moderate sized, spherical mammary glands situated far apart from each other off to the side.-somewhat odd looking!
her sideballs inspired a desire for me to 'be her braw', from behind

those sideballs looked nice from behind, but not so nice from the front!

she had some really nice sideballs!
by michael foolsley December 12, 2011
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