When your shopping with your mom and your legs get tired but you can't sit down. Also can happen in other places when you get fed up with being around your mom. Also includes girlfriend, sister, wife etc.
We were about to leave the mall but then my mom sees a sales rackand starts looking through it, and i got Shopping with your Mom legs right there, on the spot.
Fogey/fogy /fougi/ sl. (early 18C+, orig. Scot) old-fashioned, stuck-in-the mud.
Person with old fashioned ideas which he is unwilling to change: Come to the disco and stop being such an old fogey!
You think me an old fogeyand an old tory, his thoughtful voice said. I saw three generations since O’Connel’s time. I remember the famine. Do you know that the orange lodges agitated for repeal of the union twenty years before O’Connel did or before the prelates of your communion denounced him as a demagogue? You fenians forget some things. (James Joyce, Ulysses. Penguin Books,1992. p. 38)