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1.
To chop off ones' testicles during a sex act
"Oh man, I hooked up with Sandra last night and she ended up evening my stevens."

"I gave Jim a blowjob but he wouldn't let me even his stevens."

"We have an APB an a serial castrator, reports say that she seduces men into sex and proceeds to even the stevens."
by Evener of Infinite Stevens August 18, 2011