Why is the ninth month called September?
1927 (in heister "shoplifter, thief"), American English slang, probably a dialectal alteration of hoist "lift," in sense of "shoplift," also in older British slang "to lift another on one's shoulders to help him break in." As a noun, from 1936.
A robbery or holdup: Led Zeppelin was the victim of the heist (1930+ Underworld)verb
[fr an early and dialectal pronunciation of hoist; in an 1883 source hoist is defined as ''to rob houses by climbing in a window,'' because one thief climbs or hoists himself up over another]