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duh

1 ENTRIES FOUND:
duh /ˈdʌ/ usually with a prolonged vowel interjection
duh
/ˈdʌ/ usually with a prolonged vowel
interjection
Britannica Dictionary definition of DUH
US, informal
used in an angry or annoyed way to show that something just said is already known or is obvious
used to show or pretend that you do not know something