Mid-Week Girlfriend Share definition Flag A girl that you only hang out with during the week because the weekends are too busy with parties. Ya bro I totally hooked up with that chick last night because my girl is only a mid-week girlfriend Mid-Week Girlfriend by Mighty Arrow April 17, 2010 0 0 Get merch Get the Mid-Week Girlfriend mug. Buy Now — $32.95 See more merch