After a male has ejaculated semen into a partners mouth, the partner follows through with taking a shot of extremely cold vodka, swishing both semen and vodka and then swallowing whole.
Examples for Russian Mouthwash / Russian Listerine.

Jacks partner took a shot of Russian Listerine, Jack replied with "It's dynamite against germs"

Kristina was feeling frisky, and wanted to show Andy how to properly do a Russian Mouthwash.

Kristina: "Andy, do you know what a Russian Mouthwash is?"

Andy: "Isn't that where you just use vodka as mouth wash?"

Kristina: "Yes... But let me show you how to do real Russian Mouthwash"
by Maximus Penetratus February 8, 2014
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