Cor4 Fitness - What is the BOSU ball? BOSU stands for 'both sides up' meaning that the ball can be flipped on either end to target different goals. The BOSU is a
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What does Balls up mean? - Definition of Balls up - Balls up stands for A real mess up; a real mix up; bad state of affairs. By AcronymsAndSlang.com
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Throw/toss something in the air - English Language Learners Stack Exchange | Dark energy, English language learners, Language learners
What is the meaning of "I'm going to ball up on some people over there"? - Question about English (US) | HiNative
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