大 口(おおぐち)

おおぐち

noun

big mouth; big talk; large-scale (order, client)

body-part business

1. wide-open mouth; big talk, boasting

Literally a large or wide-open mouth; figuratively, boastful talk, mainly in the phrase 大口(おおぐち)を叩(たた)く.

大口(おおぐち)を開(あ)けて笑(わら)う。

He laughs with his mouth wide open.

大口(おおぐち)を叩(たた)くな。

Stop bragging.

試合(しあい)前(まえ)に大口(おおぐち)を叩(たた)いた選手(せんしゅ)が、一回戦(いっかいせん)で負(ま)けた。

The player who talked big before the tournament lost in the first round.

2. large-scale; large-lot (order, customer, deal)

Before another noun: involving a large amount of money or goods, as in business and finance.

大口(おおぐち)の注文(ちゅうもん)が入(はい)った。

A large order came in.

大口(おおぐち)顧客(こきゃく)を大切(たいせつ)にする。

We take good care of our major clients.

今月(こんげつ)は大口(おおぐち)の契約(けいやく)が二件(にけん)決(き)まり、売上(うりあげ)が大(おお)きく伸(の)びた。

Two large contracts were signed this month, and sales rose sharply.

SENSE 1 is everyday speech, and its figurative use is almost always 大口(おおぐち)を叩(たた)く. SENSE 2 is business vocabulary and stands before another noun, with or without の.

Common collocations

大口(おおぐち)を叩(たた)く: to talk big, to brag
大口(おおぐち)を開(あ)ける: to open one's mouth wide
大口(おおぐち)顧客(こきゃく)・大口(おおぐち)取引(とりひき): major client, large transaction
大口(おおぐち)注文(ちゅうもん): bulk order
大口(おおぐち)の寄付(きふ): a large donation

Similar words

大(おお)風呂敷(ぶろしき)を広(ひろ)げる: to make grandiose plans or claims
小口(こぐち): small-lot, small-scale (the opposite of SENSE 2)

Related Words

Antonym: 小口(こぐち) (small-lot, small-scale)

general

Added 2026.10.14 21:20 · Revised 2026.10.14 21:25

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