Wiktionary
heavens to betsy
interj. good gracious; good heavens
Wikipedia
Heavens to Betsy
Heavens to Betsy was an American indie- punk band formed in Olympia, Washington in 1991. It was part of the DIY riot grrrl movement in the punk rock underground in the early 1990s, and the first band of Sleater-Kinney vocalist/guitarist Corin Tucker.