hook, line and sinker

Etymology
From all the parts of a fishing tackle that may be lost to a fish. Appeared in 1838 as a metaphor from angling.

Adverb

 * 1) Completely; (of a belief or acceptance) naively or unquestioningly.
 * I told him you were just a friend, and he fell for it hook, line and sinker.

Synonyms

 * See Thesaurus:completely

Translations

 * Danish:, helt og holdent
 * Finnish: niellä nahkoineen karvoineen
 * German:, mit Haut und Haaren
 * Hungarian:, egy az egyben, , kompletten, szó nélkül, csont nélkül, úgy, ahogy van
 * Icelandic: trúa eins og nýju neti,  kokgleypa,  gleypa hrátt,  gína við
 * Norwegian Bokmål: søkke og snøre
 * Russian: со все́ми потроха́ми
 * Swedish: