A term used to describe the day(s) before and after your birthday filled with tomfoolery. A Birthday Stacker can be made up of whatever the birthday person deems stacker-worthy. For some its going out and getting belligerent with friends, for others its eating a really good sandwich. Birthday stackers are all about customization, and no Birthday Stacker is too long.
Damn, Helen is really stacking for her birthday this year. Her birthday stacker starts on Tuesday swimming with sharks and ends Sunday with a quaint brunch.