used of a person who is frozen with fright or surprise, or is trying to flee, as a result of suddenly becoming the focus of attention—alludes to the habit of deer and rabbits of stopping still when dazzled by the headlights of a motor vehicle, or of running away within the headlight beam
UK, 1909: expresses the speaker’s good faith—literally, in Scouting for Boys (1908), by Robert Baden-Powell: the honour on which a Scout promises to obey the Scout Law
1927—a mystery man The Westminster Gazette’s readers were challenged to identify in order to claim prize money—‘Lobby Lud’: the Gazette’s telegraphic address