Definition

An exclamation expressing alarm, embarrassment, or disapproval in response to something awkward, unpleasant, or surprising.

Example Usage

Yikes, did you really send that text to your boss instead of your friend?

Origin

Likely a variant of 'yike' or 'yoicks' (a hunting cry), with modern usage solidifying in American English by the mid-20th century.

Fun Fact

The term became particularly prominent in internet culture and memes in the 2010s, often used ironically to react to cringe-worthy or absurd moments.

Source: Definition backfill (hailey)