1 definition by red headed clanker

When in an act of a 3-some involved with a female and two males and one penis is in the ass and one penis is in the vagina and their balls are alternating turns clanking together with their momentum.

hip thrust x ball mass = good times squared
My balls created some sick momentum at the Newton's Cradle party last night but now my balls are sore. Are yours?
by red headed clanker July 7, 2011
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