Slangy noun describing a situation where someone loses overwhelmingly or is beaten hands down. Often used in competitive contexts like games, fights, or arguments.
一蹴 is a more literary term for 'rejecting easily' or 'beating easily', often used as a suru-verb, whereas イチコロ is a casual noun.
Etymology
The origin is uncertain, but it likely derives from 一 (いち, 'one') and 殺 (ころ, from 殺す, 'to kill'), suggesting a 'one-hit kill' or instant defeat. The exact derivation is not confirmed.
