Definition of air quotes noun from the Oxford Advanced Learner's Dictionary

 

air quotes

 noun
noun
BrE
 
; NAmE
 
[plural]
 
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imaginary quotation marks made in the air with your fingers when you are speaking, to show that you are using a word or phrase in an unusual way, especially when it is not an expression you would usually use yourself
See the Oxford Advanced American Dictionary entry: air quotes