Definition of sniffy adjective from the Oxford Advanced American Dictionary

 

sniffy

 adjective
adjective
NAmE//ˈsnɪfi//
 
sniffy (about something)(informal)
 
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not approving of something or someone because you think they are not good enough for you They were very sniffy about letting us in without jackets.
See the Oxford Advanced Learner's Dictionary entry: sniffy