Hanes Miscalculation

(n.) the act of wearing an unflattering pair of underwear, erroneously calculating that no one would see you in your underwear for the day.

Can apply to faded, fraying, or everyday underwear brands such as Hanes or Fruit of the Loom. Is often a symptom of stag reflex.

Person 1: Lauren saw me in my workout-only boxer briefs today
Person 2: An unforgivable Hanes miscalculation.