in nothing flatIn very little time, very quickly
[TahlilGaran] Dictionary of Contemporary English ▲
in nothing flatSee: IN NO TIME.
{adv. phr.}, {informal} In a very little time; soon; quickly.
When the entire class worked together they finished the project in no time. The bus filled with students in nothing flat. [TahlilGaran] English Idioms Dictionary ▲