underdaks
/ˈʌndədaks
/plural noun Australian informal
Underpants: first of all they stripped me down to my underdaks and then they sprayed me all over...
- We haven't seen much of Steve lately but we've seen lots of his son, Nick, parading in underdaks during the fashion festival.
- Wear your underdaks if you don't want to get naked.
- He had often mused that clean underdaks would be the least of your worries if hit by a double-decker.
Origin
1980s: from under + daks.