gee whiz /dʒiː wɪz/adjective 1exclamation 1 adjective1 •(informal) Very good, impressive.These are some gee-whiz photographs. exclamation1 •(US, old-fashioned) An expression of surprise, enthusiasm, or annoyance: wow or so what?You only got 10% in the test. Gee whiz – you'll get over it.
