the russian underside is when your lady gets on top of you upside down and backwards and masturbates you with a 400 pound salmon while you masturbate her with a snow fox.
"Natascha, I think we need to spice up our love life"
"Boris, if you go to the fish store and get some salmon, we can do the Russian Underside and things will be so much hotter!"
A man returned from a drunken and chemically facilitated night out on the wrong side of the tracks. Another man, upon seeing our hero's return, quipped: "he's been scratching the underside".
By Tiphany
The French Underside Childmaker
A sexual act in which a male picks a female up, shoves them into a ceiling fan, and proceeds to fuck them, wether if they are dead or not.
