Hype
1920s (originally US in the sense ‘short-change, cheat’, or ‘person who cheats etc.’): of unknown origin.
wiktionary
Clipping of hyperbole.
hype ( comparative more hype, superlative most hype)
Perhaps from hypodermic needle?
hype (plural hypes)
etymonline
hype (n.)
"excessive or misleading publicity or advertising," 1967, American English (the verb is attested from 1937), probably in part a back-formation of hyperbole, but also from underworld slang verb hype "to swindle by overcharging or short-changing" (1926), itself a back-formation from hyper "short-change con man" (1914), from the prefix hyper- meaning "over, to excess."
Also possibly influenced by drug addicts' slang hype, shortening of hypodermic needle (1913). Related: Hyped; hyping. In early 18c., hyp "morbid depression of the spirits" was colloquial for hypochondria (usually as the hyp or the hyps).
