You should pack a 'change of underwear'. [=additional underwear that you can wear at another time]
He answered the door 'in his underwear'. [=while wearing only underwear]
(..) l'm gonna check the bathroom. Find anything? No. Not yet. You won't believe what l.... What the hell are you doing? Sniffing chicks' underwear, man. What is the big.... lt's.... What? They're guys, aren't they? You really are disgusting. -Can l buy you a drink? (..)2004 White Chicks
(..) How's that? l can't breathe. Honey, this is just not going to work. l'm sorry. Well, of course not. You're wearing the wrong underwear. ls that better? l can taste the leather. Okay, you need a pair of hot shoes. What size do you wear again? -Fourteen. (..)2004 White Chicks