Complex sentence: The "Online Etymology Dictionary" by Douglas Harper attests the usage of the term in this general meaning since 1942, although earlier Jean Harlow was so nicknamed; according to David Stenn, it was due to the 1933 film "Bombshell".
Split into simpler sentences: The "Online Etymology Dictionary" by Douglas Harper attests the usage of the term in this general meaning since 1942, although earlier Jean Harlow was so nicknamed. Some authors point out it was due to the 1933 film "Bombshell".