Б251
с бухты-барАхты (c бухта-барАхта
obs) сделать, сказать что и т. п.
collPrepPthese forms onlyadv(to do, say sth. ) rashly, suddenly, without taking time to think, without preparation or deliberation: (do (say) sth. ) without thinking (out of the blue, all of a sudden)
(do
sth. ) on the spur of the moment(say
sth. ) off the top of one's head(in limited contexts) (do
sth. ) just like that.