back mullet

the patch of hair above the male ass-crack

Did you see that fatass in the front row lean forward? He needs to trim that nasty ass back mullet.

by J-Tweezy2004 June 12, 2007

back button

anus - Also known as leather cheerio.

He leaned over and showed me his back button.

by Phred Fillibuster February 8, 2008

Thwack-Back

When having sex with a male(homosexual or transexual) and their penis slaps against you.

As we fucked, her penis kept hitting my leg, causing thwack-back

by Thwacker April 4, 2008

cottage back

A seasonal medical condition that arises on a Monday after or a Friday prior to a nice weekend in the summer in which the reported back pain is directly proportional to the sunniness and temperature outside; results in one’s inability to come to work on the affected Monday or Friday and he/she having a three-day weekend that is likely spent drinking beer on the dock at his/her cottage or cabin while his/her co-workers pick up the slack back at the office.

My co-worker came down with cottage back; it prevented her from coming into work last Friday, and when she came in on Monday, her back was fine, and she also had a tan.

by Mrs. Columbia June 11, 2008

fully backed

Your parents have your back. They are helping to support you. You are your own person...with the help of your parents.

I've graduated from college and now I'm on my own...fully backed.

by spirit434 April 19, 2014

the switch back

The process of switching from one female to the other through sexual intercourse. Whether it's oral, anal, or vaginal, the females must be on each other or close by in order to complete the switch back fast enough.

Sarah and Tina were laying on top of each other kissing, while Jim was preforming the switch back on both of them.

by Boo The Guru May 15, 2014

Back Flip

A full 360 backwards rotation somersault in the air.

Michael: Have you see that guy do that really sick back flip?

Rob: Yeah, dude. That was really cool!

by GoFlushYourToilet September 1, 2017