A lot vs. Alot: 9 Grammatical Pitfalls
1670s, variant of dialectal skiver (1660s), perhaps from a Scandinavian source, cf. Old Norse skifa "a cut, slice" (of bread, etc.), Swedish skifer "a slate," which are related to shiver (n.1) "small piece."
1701, from the noun. Related: Skewered; skewering.