| made-up(adjective, free, informal, snap, unrehearsed) |
| makeshift(adjective, free, informal, casual, snap) |
| off the cuff(expression, adjective, idiom, free, unrehearsed) |
| off the top of head(expression, idiom, free, informal, casual) |
| offhand(adjective, free, informal, casual, unprepared) |
| on-the-spot(adjective, free, informal, casual, snap) |
| on impulse(expression, adjective, free, informal, casual) |
| played by ear(expression, adjective, fake, unprepared, unplanned) |
| shot from the hip(expression, adjective, idiom, fake, affected) |
| snap(adjective, free, informal, casual, unrehearsed) |
| spontaneous(adjective, free, informal, snap, unprepared) |
| spur-of-the-moment(adjective, free, informal, casual, snap) |
| spur of the moment(expression, adjective, idiom, mock, affected) |
| taking for ride(expression, idiom, free, informal, casual) |
| thought out loud(expression, idiom, free, informal, casual) |
| thrown off(expression, adjective, fake, mock, affected) |
| tossed out(expression, adjective, free, informal, casual) |
| unplanned(adjective, free, informal, casual, unprepared) |
| unpremeditated(adjective, free, informal, casual, snap) |
| unprepared(adjective, free, informal, snap, unplanned) |