К-21

КАКОЕ ТАМ (ТУТ)! coll these forms only fixed WO

1. (Particle) used to express disagreement with some statement or to correct one's own words (the part of the statement that is objected to or corrected is repeated): (but) what am I (are you) saying (talking about)...!

what do you mean,...! (in limited contexts) don't call it... Нас там было человек пятнадцать, - да нет, какое там пятнадцать, не меньше тридцати. There were about fifteen of us there-but wait, what am I saying, fifteen —there were no fewer than thirty.

2.

Interj ) used to express a negative reaction to a suggestion, request etc, express one's opinion that some suggestion is unrealistic, some undertaking is futile etc

no way!

nothing doing! not on your (sweet) life! not a chance! (in limited contexts) far from it.

...Лукашин начал действовать. He прямо, конечно, чтобы встретились, как мужчина с мужчиной, и давай по-деловому, раз уж так все получилось. Какое там! До встречи ли ему, когда его от одного имени Григория трясёт... (Абрамов 1). .. .Lukashin had started to act. Not directly, of course. Not a meeting in man-to-man, "let's get on with it since this is the way things have worked out" fashion. Not on your sweet life! How could he be in a mood to meet with Grigory when the mere mention of his name made him quiver?... (1a).