American English

Definition of het up adjective from the Oxford Advanced American Dictionary

 

het up

 adjective
adjective
NAmE//ˌhɛt̮ ˈʌp//
 
[not before noun] het up (about/over something) (informal) (becoming old-fashioned)
 
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anxious, excited, or slightly angry What are you getting so het up about?
See the Oxford Advanced Learner's Dictionary entry: het up