Snidely was my hero when I was a kid
per dictionary.com:
"1570s, "the lash of a whip," from whip (n.) + lash (n.). The injury caused by sudden head motion so called by 1955, in reference to the notion of moving to and fro like a cracking whip. The verb in this sense is recorded by 1971."
Snidely came after the term was used for the injury by about 5 years.
