パチこく

godan verb (-ku), intransitive verb

to lie; to tell a lie

Slang term derived from pachinko parlance; literally 'to say pachi', implying a false or exaggerated claim, often about pachinko winnings or related matters. Used informally among enthusiasts.

See also: こく

• あいつ、またパチこいてるよ。

  That guy is lying again.