Definition

Shockingly evil, wicked, or offensive; extremely bad or appalling. Originally a legal term for grave crimes, now used more broadly for moral or social transgressions.

Example Usage

That's a heinous betrayal of trust.

Origin

From Old French 'heinous,' derived from Latin 'hainosus,' meaning detestable or abominable.

Fun Fact

Gained renewed popularity in 1980s-90s slang through 'Bill & Ted's Excellent Adventure,' where it was used to describe anything terrible.

Source: Definition backfill (hailey)

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