一いっ杯ぱい食くわす

い

っ

ぱ

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く

わ

す

Meanings

1

expression, godan verb (-su)

play a trick on; cheat; deceive; dupe

Idiomatic expression meaning to trick or deceive someone, often in a cunning or underhanded way. Conveys a sense of pulling one over on someone.

彼かれは友ゆう人じんを一いっ杯ぱい食くわして、お金かねをだまし取とった。
He played a trick on his friend and swindled money out of him.

まんまと一いっ杯ぱい食くわされた。

I was completely duped.

Written forms

一いっ杯ぱい食くわす
Standard kanji-kana spelling for this idiomatic expression.
いっぱい食くわす
Kana spelling of the first part; less common but still used.

Kanji

一one, one radical (no.1)
杯counter for cupfuls, wine glass, glass
食eat, food

Similar words

騙だます
騙す is a general verb for deceiving or lying to someone. 一杯食わす is a more colorful, idiomatic expression emphasizing a cunning trick or scheme.
一いっ杯ぱい食くう
一杯食う is the intransitive counterpart meaning 'to be tricked' or 'to be taken in'. 一杯食わす is the transitive form meaning 'to trick someone'.

Etymology

The phrase likely originates from the idea of making someone eat or swallow something unpleasant (一杯 means 'one cupful' or 'a dose'), metaphorically forcing them to accept a deception. The exact historical derivation is uncertain.