Waldorf Birthmark

A term used to define a tattoo that a girl gets on the small of her back. Maryland regional variant of the Tramp Stamp.

Also known as a Dundalk Birthmark

That girl over there has a Waldorf Birthmark,she might as well say she's putting out.

by Hunter Keeler May 7, 2008

Tandem-birthday

A birthday that both you and an acquaintance share.

Hell's yeah brother! Happy tandem-birthday! XD

by Marquis8 December 27, 2010

rehearsal birthday

A rehearsal birthday is spontaneously given when the person with the upcoming birthday is in danger of buying the exact same gift that you have already gone to a lot of trouble to acquire.

"We had to throw a rehearsal birthday as Emma announced she was going to get a new skateboard today - I bought one for her 3 weeks ago."

by wonfuji January 19, 2013

happy birthday tidal wave

When you're at school and one of your friends in the class wishes you happy birthday outloud, reminding the others, that you born that day, and they all start saying happy birthday.

"do you want another happy birthday tidal wave next year?"
"no thanks, and please next time don't say it outloud, it is so awkward"

by ihateschoolsobadlyomfg October 14, 2013

empty birthday

The celebration of a birthday of someone who has passed away or left in some way

Last week we celebrated Sargent Thompson's empty birthday

by Mr.James August 7, 2014

DIY Birthday Divorce

When somebody plots to divorce an unlucky couple on one of the partners birthdays by placing a fake wedding ring into the girlfriends glass.

Oh shit, I just heard rob did a DIY Birthday Divorce. What an asshole

by MooDank August 31, 2016

butthole birthcontrol

Using anal sex instead of vaginal sex to act as a form of birth control. Lubrication is necessary in most cases as is convincing a woman to use this form of birth control, but there will be no butt babies and it is 99.99% effective.

Butthole birthcontrol is an effective way to prevent pregnancy.

by BaconMastert September 20, 2016