panties
noun /ˈpæntiz/
  /ˈpæntiz/
 (especially North American English) (British English also knickers)
 [plural]Idioms - a piece of women’s underwear that covers the body from the middle part to the tops of the legsTopics Clothes and Fashionb1Oxford Collocations Dictionaryadjective- cotton
- lace
 - pair
 - wear
- pull down
- pull on
- …
 - bra and panties
 
Idioms 
get your panties in a bunch (North American English) 
(North American English get your knickers in a twist)
- (informal) to become angry, confused or upset