When someone (usually a girl) walks while bobbing their head side-to-side making their hair move funny. See Jan Brady and in particular, the Brady Bunch movie.
Guy 1: Who's that chick? Why's she walking so funny?
Guy 2: Yeah, she's got that Jan Brady walk going on. Weird.
Guy 2: Yeah, she's got that Jan Brady walk going on. Weird.
by Gargy B March 26, 2008