something composed on the spur of the moment;
something one just dashed off
м. impromptu, improvisation;
~ом нареч. impromptu, on the spur of the moment;
произнести речь ~ом make* an impromptu speech, speak* extempore, extemporize.
~ом нареч. impromptu, on the spur of the moment;
произнести речь ~ом make* an impromptu speech, speak* extempore, extemporize.
Большой англо-русский и русско-английский словарь. 2001.