| out of hand(expression, idiom) |
| played by ear(expression, adjective, idiom, unqualified, unprepared) |
| shot from the hip(expression, adjective, idiom, unprepared, impromptu) |
| snap(free, informal, casual, unrehearsed, improvised) |
| spur of the moment(expression, adjective, idiom, adverb, impulsive) |
| taken off guard(expression, idiom, unqualified, unsuspecting, unready) |
| taking for ride(expression, free, informal, casual, snap) |
| thought out loud(expression, free, informal, casual, snap) |
| thrown off(expression, unprepared, unplanned, unrehearsed) |
| tossed off(expression, free, informal, casual, unrehearsed) |
| tossed out(expression, free, informal, casual, snap) |
| unarranged(adjective, unprepared, unplanned, unrehearsed) |
| unready(unqualified, unsuspecting) |
| whipped up(expression, adjective, unprepared, impromptu, unplanned) |
| winging it(expression, free, informal, casual, snap) |
| without preparation(expression, impromptu, extemporaneous, spontaneously, improv) |
| abruptly |
| according to pleasure(expression, idiom, spontaneously, improv, extemporaneously) |
| ad libitum(expression, spontaneously, improv, extemporaneously) |
| as one thinks best(expression, idiom, spontaneously, improv, extemporaneously) |