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The act of placing one's testicles firmly between someone else's breasts, or "topping" the breasts with the "nuts".
Person 1 - "I feel like our sex life has become repetitive, and I want to try something new "
Person 2 - "I've always wanted to try 'nut topping'. It sounds like it would be fun!"
by yak the snak March 19, 2017
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