| at first glance(expression, idiom, free, informal, casual) |
| automatic(adjective, free, informal, casual, impulsive) |
| autoschediastic(adjective, free, casual, impulsive, spontaneous) |
| casual(adjective, free, informal, impulsive, unprepared) |
| dashed off(expression, adjective, fake, mock, affected) |
| expedient(adjective, free, informal, casual, snap) |
| extemporary(adjective, free, fake, casual, impulsive) |
| extemporized(adjective, fake, spontaneous, unprepared, unplanned) |
| fake(adjective, free, casual, impulsive, spontaneous) |
| faked(adjective, fake, mock, affected, unprepared) |
| free(adjective, informal, casual, impulsive, unprepared) |
| immediate(adjective, free, informal, casual, snap) |
| informal(adjective, free, casual, impulsive, snap) |
| jamming(adjective, free, informal, casual, snap) |
| jury-rigged |
| made-up(adjective, free, informal, casual, spontaneous) |
| off-the-cuff(adjective, spontaneous, unprepared, impromptu, unplanned) |
| off the cuff(expression, adjective, idiom, free, impromptu) |
| off the top of head(expression, idiom, free, informal, casual) |
| played by ear(expression, adjective, fake, unprepared, unplanned) |