Russian Underside

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!"

by milkmaid604 June 13, 2007

undercunt

(to) undercunt ′ʌndəkʌnt: to be less of a cunt than someone else

1. Allie was being a cunt to a coworker but ended up getting undercunted.

2. "I'm not saying you're a cunt but the other girls at the party were all undercunting you."

- "Okay, now you can really go fuck yourself, Brad!"

by alliebro August 4, 2011

Underground Railroad

This is a sexual act where 2 or more men have sex with a black woman at the same time. Many refer to 2 men having sex with a female at the same time as 'Running a Train,' hence the name since it pertains to the same act with a black female. The black woman who is part of the act can then be refered to thereafter as a 'Harriet Tubman'. (See Hariet Tubman). This act can be performed anywhere.

Billy: Yo last night me and Bobby had an underground railroad with that black girl Marissa.
Ralph: What do you mean?
Billy: We were chillin in my car & she started sucking my dick when Bobbby was fucking her from behind.
Ralph: Totally Awesome!
Billy: Yea, I changed her name in my phone to Harriet Tubman

by Koozy September 15, 2006

underskirt

A slip is a woman's undergarment worn beneath a dress or skirt to help it hang smoothly and to prevent chafing of the skin from coarse fabrics such as wool. Slips are also worn for warmth, and to protect fine fabrics from perspiration.

Guy : "You could see her pink underskirt hanging below the hemline"
---
Mom : "Monica what will you be wearing for the dance today ?"
Monica : "Planning to wear the cream long dress, mom"

Mom : "Thats nice, but remember to wear a underskirt as it is a bit transparent"
----
Principal : "Girls should wear underskirts with their dresses for modesty"

by Gennylk July 2, 2007

Undercover Anal

Going through the day with anal beads or a dildo in one's ass; unbeknownst to the general public.

"Charles looks like he's been horseback riding all day."

"Naah; he must be going Undercover Anal."

by Pastamon March 11, 2010

Under the pier

The act of sucking a cock near the sea

Sophie and Louie Were under the pier last night

by Suck ya mum May 17, 2016

B-string Underwear

Items in your underwear collection that are not suitable for special occasions, and are otherwise ratty underwear that you wouldn't want anyone else catching sight of.

I'm staying in tonight and there's no chance of getting laid, so I'll just grab a pair of b-string underwear.

by parkslump July 4, 2010