Backdraft

The odor cloud that hits an unsuspecting person when they open their office door after a co-worker has farted in it.

"I now always stick my nose under my office door and check the air, as to avoid being the victim of a backdraft."

by Scullnick July 31, 2012

backdoor bone dog

A specific variation of the act of coppulation, where as the contributing party (usually being male) assumes a saddled position over the receiving party (usually female or sometimes domestic animal) and proceeds to "give the dog a bone" rectally.

I owned it, backdoor bone dog 180 tailside powerslide grab and rode it all the way to town.

by DirtyD November 4, 2004

backdate

When you have a school project that you were told about six months ago, but you did it the night it was due, you backdate it by putting dating a day from earlier to make it seem like you've been working on it for a while. Also very useful when you're doing an assignment the day its due.

Joe had just finished his history paper second period on the day it was due; in the heading, he backdated it a week so that the teacher would believe he didn't do a half-ass job on it.

by g_oo_gle May 2, 2005

Backdoor

When your friend has a girl he fucking and wen he stop messing wit her u go behind him and fuck her

Shidd u done wit yo bitch. Finna backdoor yo ass twin #M

by Money M May 30, 2018

Baltimore Backdraft

This grotesque act takes place when one individual deficates into the funnel while the other individual blows into the tube at the end of the funnel. When the feces is blown back to the other partners anus, it is known as the Baltimore Backdraft.

Due to her incredible lung capacity, she was able to send crap all the way to the ceiling, making me think twice before preforming the Baltimore Backdraft again.

by cubsfan0147 October 15, 2009

backdraft

An explosive surge in a fire produced by the sudden mixing of air with other combustible gases. This is caused by a condition in a fire where oxygen is depleted and the fire dies down until a door is opened and the fire flares violently from the sudden intake of oxygen. Backdraft can be described as a small explosion.

The most common tactic used by firefighters in defusing a potential backdraft is to ventilate from the highest point, allowing the heat and smoke to escape without igniting explosively.

by Ryan Carpenter October 14, 2006

backdoor 69

the act of eating each other's assholes out at the same time

also known as the double salad toss

The two fruity bastards enaged in some backdoor 69 action before the usual rear entry

by Wang Guards 'R Us May 6, 2005