Seis 

A person who breaks the Sixth Commandment which signifies the person slept with a married person.

"Oh shit! He just pulled a Seis"

High five for scoring with a married chick man!

Seis by Seis716 July 20, 2010

seis 

a type of monkey

that kid named ethzi is a seis.

seis by mgripsngsfsefsfsefesa October 14, 2022

Seis de Mayo 

The day after Cinco de Mayo; usually characterized by deadly farts, a killer hangover, and dormir mucho.

I love Cinco de Mayo- Taco Bell, Corona and lime, sombreros, and jammin' to mariachi songs!
I HATE Seis de Mayo- farts that smell like chalupas and a hangover the size of Mexico. It sucks big cojones.

Seis de Mayo by moroho May 6, 2010

Seis de Mayo 

the 6th of May - a special holiday, devoted to nursing hangovers and otherwise dealing with the consequences of Cinco de Mayo

Tom: "Hey Dave, why didn't you show up for work yesterday?"
Dave: "It was May 6th, remember?"
Tom: "Duuude, you were so wasted on Cinco de Mayo- you downed like a full bottle of tequila! That must've been a killer hangover!"
Dave: "That's what why we have Seis de Mayo and aspirin."

Seis de Mayo by dbierman May 7, 2010

Seis de Mayo 

Hipsters' version of Cinco de Mayo, becuase if hey celibrated that, it would be too "mainstream."

Elliot: Happy Cinco de Mayo!
James: Come on, you're killin' my buzz, wait 'till tomarrow.
Elliot: What's tomarrow?
James: Seis de Mayo, cause Cinco de Mayo's too mainstream.
Elliot: oh..cool?...
James: No.. chill.

Seis de Mayo by sexypeacockfromhell October 20, 2012

Seis-Nut 

The one who has three testicles per side.

I am Seis-Nut. I have more balls than you can ever imagine.

Seis-Nut by Ryan January 24, 2003

Seis leches cake 

When you are the last man up in a 6 on one and you go down on the woman who has received 5 cream pies

After waiting and watching all night Jake couldn’t help but have some Seis leches cake

Seis leches cake by PevereIl March 1, 2024