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The fight for "Sexual Dominance" between two dominant personalities, decided by a bout of animalistic fucking.

Expansions of the phraze can include addages to the coital warcraft such as

"Black Metal Shag Battle" The act of fighting for sexual supremacy via primal lovemaking while violently screaming "Dissection" lyrics at each other.
"The sexual tension between Morgan and Kate resulted in a brutal Shag Battle destroying the company hotel suite."
by amadeusparasyte July 09, 2016
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