[1920s+] used in a variety of phrs. as a euph. for Christ/God.
[1920s+] (Can.) a mild oath.
[1910s+] (US) honestly, sincerely; also as adj.
[1910s–50s] a mild oath.
[1950s] a phr. used to indicate one’s incomprehension.
see separate entry.
[1920s–30s] a euph. excl. of exasperation or surprise, for goodness’ sake!