| natural(adjective, simple, casual, impulsive, willing) |
| off the hip(expression, idiom, adverb, offhand, impromptu) |
| off the top of head(expression, idiom, adverb, free, impromptu) |
| off top of head(expression, adjective, idiom, adverb, simple) |
| on-the-spot(free, casual, impulsive, spontaneous, unprepared) |
| on impulse(expression, free, casual, impulsive, unprepared) |
| pantomimed(verb, dramatized) |
| played by ear(expression, idiom, unqualified, unprepared, unrehearsed) |
| precipitate |
| presented(verb, dramatized) |
| queer(untrue, developed, fictitious, invented, fabricated) |
| quick-and-dirty |
| rash(adjective, impulsive) |
| reflexive(adjective, impulsive) |
| romantic(untrue, developed, fictitious, invented, fabricated) |
| shot from the hip(expression, idiom, unprepared, unplanned, unrehearsed) |
| simple(adjective, natural, casual, crude, impulsive) |
| simulated(untrue, developed, fictitious, invented, fabricated) |
| spur of the moment(expression, adverb, free, casual, offhand) |
| spurious(untrue, developed, fictitious, invented, fabricated) |