Definition & Meaning of "gee whiz"in English

What is the origin of the exclamation "gee whiz" and how is it used?

Gee whiz is an exclamation used to express surprise, amazement, or disbelief. It appeared in American English in the early 20th century as a mild euphemism for "Jesus," allowing speakers to react strongly without offending religious sensibilities. People used it in newspapers, comic strips, radio, and everyday conversation to convey astonishment or shock in a lighthearted way. Today it is inoffensive, whimsical, and slightly old-fashioned, often adding a playful or emphatic tone to expressions of surprise or amazement.