exclamation of surprise, 1895, probably euphemistic for Jesus. Form gee whiz is attested from 1871; gee whillikens (1851) seems to be the oldest form.
A gallon of liquor
[1940s+ Hoboes; abbreviation of gallon]
[abbreviation of grand]
An exclamation of surprise, pleasure, sheepishness, etc; gee whiz
[1895+; a euphemism for Jesus]
Disgusting; rebarbative; gross
[1970s+ Teenagers; abbreviation of gross]