1. Ball bearings between male homoerectus legs
2. Game in which sacks of balls are hurled at gay German men named Charles T*ng
3. The shit between your legs
4. is a nickname for people who have the name Zak. Ballzak's usually think that they're strong, but in reality the can only bench bar. Ballzak's usually third wheel a lot and laugh at their own jokes.
"Yo, ballzak just benched 20 pounds and he said that his pecs are "too big""
"Charles played Ballzak with his gay ass friends"
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