Back side 

Hit it doggy Style

Back side by Quazimoto June 5, 2003

Back side 

dairy-air, as in:

i'll put a whuppun 2 ur backside, yah crackuh!

Back side by DCPimp August 24, 2003

back side bonus 

The frosting that sticks on the bottom side of your donut from the donut below.

Melanie picked out a donut out of the box and received one with a little Back Side Bonus.

back side bonus by Quincerr September 30, 2012

back-side attack 

Term used for the attachment of the nucleophile in an SN2 reaction to kick off the leaving group. In slang, it means to fail a test or have a lot of difficulty on a test, especially an organic chemistry test.

That orgo test just back-side attacked me, SN2 style.

back-side attack by synchrohobbit November 20, 2006

Back side of the clock

The civilian equivalent of the military term "o dark thirties". Equates to the 11pm to 7am 3rd shift for businesses which run 24/7.also. Known as "graveyard shift".

I'll be working the back side of the clock for the next few weeks. I'll always be eating breakfast!

Back side of the clock by 4realazitgits March 23, 2021

Back Side Toe 

When girl bends over and you can see her camel toe from behind

Bro, did you see that girl in the yoga pants bend over? I saw complete Back Side Toe.

Back Side Toe by Fistie McGee April 23, 2022

pullback back-side 

The act of getting a blowjob from the back.

She is a freak man. I bent over and she pulled my penis to the back and started sucking it.

O so she gave you a pullback back-side blowjob

pullback back-side by slap happy7 December 8, 2011