言いい出だしっぺ

noun

person who first suggested something; person who brought up a matter

Often carries a nuance that the person who first suggested something should take responsibility for it or do it themselves. Commonly used in the phrase 言い出しっぺの法則 (the rule that the one who suggests it has to do it).

See also: 言い出しべ (いいだしべ)

• 言いい出だしっぺの君きみが、まずやってみせてよ。

  Since you're the one who suggested it, you should try it first.

• 会かい議ぎで言いい出だしっぺになった以い上じょう、最さい後ごまで責せき任にんを持もちます。

  Since I was the one who raised the matter at the meeting, I'll take responsibility until the end.