blow smoke

Verb

idiomatic

(idiomatic) To speak with a lack of credibility, sense, purpose, or truth; to speak nonsense.

Japanese Meaning

根拠や信憑性がない（でたらめな）話をする。 / 意味や目的に欠け、信用できない発言をする。

Don't blow smoke at the committee; they'll see right through any fabricated numbers.

委員会に対してはったりをかますのはやめてください。でっち上げた数値はすぐに見抜かれますよ。

Sense（1）

(idiomatic) To speak with a lack of credibility, sense, purpose, or truth; to speak nonsense.

Are these "statistics" they cite verifiable, or are they just blowing smoke, trying to scare people?

blows smoke

（ present singular third-person ）

blowing smoke

（ participle present ）

blew smoke

（ past ）

blown smoke

（ participle past ）