1. exclamation People sometimes say gee whiz in order to express a strong reaction to something or to introduce a remark or response. [US, informal, feelings] ⇒ Gee whiz, they carried on and on, they loved the evening. 2. adjective [ADJ n] You use gee whiz to describe something that is new, exciting, and impressive, but that is perhaps more complicated or showy than it needs to be. [mainly US, informal] ⇒ The trend now is towards 'lifestyle' electronics–black, shiny gee-whiz things that people like to own.
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