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1.
A condition consisting of tired legs, resulting from too much unwanted time spent walking around the mall with your wife/girlfriend/mom. Sometimes includes tiredness in upper body/arms.

May also be used to describe similar afflictions experienced in other venues.
I can't handle Old Navy right now, Mom. We've been here for three hours and I have a serious case of mall legs.
by Hattrick12488 May 16, 2011