To try or guess at something without having any knowledge about the subject.
shot in the dark
A guess, attempt, or choice made with little or no evidence or knowled…
whistle in the dark
To speak of something despite having little knowledge of it.
all the gear and no idea
Having high-quality, expensive equipment for a risky or difficult acti…
shoot from the lip
To speak confidently and unhesitantly but without careful forethought …
live a lie
To conceal something about oneself, without the knowledge of which oth…
fall into
To enter something (especially a profession) without having planned it…