spot - 1: a: (precise place) Stelle ...;
put sb. on the spot - (fig. coll.: cause difficulties for sb.) jmdn. in Verlegenheit bringen
spot - 1: ... f: (= difficulty) Klemme; ...
to put sb. in a /or/ on the spot - jdn in Verlegenheit /or/ Schwulitäten bringen
spot - ... Idioms: ... put someone on the spot - (informal) force someone into a situation in which they must make a difficult decision or answer a difficult question.
Random House unabridged:
spot - ... 19. in a (bad) spot - (U.S. Slang) in an uncomfortable or dangerous predicament: 'Whenever she was in a spot she'd write to her father and he'd send a check.' 20. on the spot - a. without delay; at once; instantly. b. at the very place in question. c. (U.S. Slang.) in a difficult or embarrassing position. d. (U.S. Slang.) in a position of being expected to act or respond in some way.
Webster's 3rd unabridged:
spot - ... 11 a: a situation with respect to conditions and circumstances: POSITION <a tough ~> <a fine ~ for rapid promotion> b: a position of difficulty or embarrassment: FIX, PREDICAMENT <was indeed in a dilemma in a ~ ...> <one of those ~s you get in ...> ...
on the spot /or/ upon the spot - 1: before moving or without further consideration: at once: IMMEDIATELY <decided on the spot> 2: at the place where action is required <sent to investigate on the spot> <found everything he needed right on the spot> 3 a: in a position of being held responsible or accountable or of being required to furnish a satisfactory explanation or reply: in trouble or difficulty: in a spot
put K. on the spot, asking her what went wrong and implying her performance was a failure.
And I'm not trying to put you on the spot here, General, but it would seem that we're not going to be out [of Iraq] in six months or a year or a couple of years ...
Trainees prefer to play in teams. (Putting individuals on the spot we have found is frequently counterproductive.)
"I think you could put them all in a bag and draw one out. But if you put me on the spot, I'd say Swansea."
maybe some of you started volunteering because someone put you on the spot and asked for help and you couldn't say no
A key aspect of the forum was the chance to put candidates on the spot with anonymous written questions.
People try to put us on the spot and ask which one of the two cups we'd prefer to win. I just answer "both".
she likes the [choir's] less formal nature. "They're friendly and informal. They don't make you try out [= audition] or put you on the spot."
Although it can often be difficult for the TA [= teaching assistant] to put him/herself on the spot, student criticism ultimately helps both the student and teacher
poets strenuously resented our request that they pinpoint their poetics, and in retrospect we felt guilty for having put them uncomfortably on the spot
[Amer. football] The offense has repeatedly put the defense on the spot with turnovers.
can't tell if this is relevant until the link works again: related discussion:to put sb. on a spot