backside attack 

Proper: A chemistry term used to describe the transfer of electrons and subsequent bonding of a neucleophile to the back face of a molecule. The back side described is the chiral center, with subsistents in a tetrahedral formation facing away from the nucleophile. Once the backside attack is complete, the stereochemistry of the molecule is inverted.

chem eng slang: A difficult academic situation. It is often used to describe the difficulty of an assignment or a test. Synonymous with ass rape.

"Oh shit, that exam was a total backside attack!"

backside attack by Electrick April 17, 2006

Backside Attack 

1) The SN2 mechanism in which the nucleophile attacks the alpha carbon from a direction directly opposite to the C-LG bond. Results in inversion of stereochemical configuration.

2) When attacking a loved one from the back side

1) Wow that strong nucleophile caused one hell of a backside attack.

2) John: dude i went for the back side attack last night
Joe: Howd it go
John: Lets not go there.....

Backside Attack by morty foster July 20, 2008

Backside attack 

Fucking someone in their asshole.

"Yo, last night was mad crazy when you gave me the backside attack."

Backside attack by CHEMTROLL November 15, 2011

backside attack 

Real-A term used in chemistry to describe a chemical reaction mechanism.

Slang-When a girl who doesn't know you are there bends over and you (attack/ hump the fuck out of) her backside.

Girly was bending over so i busted her up with a backside attack

backside attack by The Doug April 11, 2003

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