| informal(adjective, free, casual, snap, unrehearsed) |
| jamming(adjective, free, informal, casual, snap) |
| jerk around(verb, expression, trick, deceive, fool) |
| lead on(verb, expression, cheat, deceive, jiving) |
| made-up(adjective, free, informal, snap, unrehearsed) |
| makeshift(adjective, free, informal, casual, snap) |
| off the cuff(adjective, free, informal, casual, snap) |
| off the top of head(expression, idiom, free, informal, casual) |
| on-the-spot(adjective, free, informal, casual, snap) |
| on impulse(expression, adjective, free, informal, casual) |
| pull fast one(verb, expression, idiom, cheat, deceive) |
| put one over on(verb, expression, idiom, swindle, jiving) |
| rope in(verb, expression, trick, deceive, fool) |
| sandbag(verb, trick, deceive, fool, swindle) |
| scammed(verb, deceive, swindle, jiving, misguide) |
| snap(adjective, free, informal, casual, unrehearsed) |
| snowed(verb, deceive, swindle, jiving, misguide) |
| spontaneous(adjective, free, informal, snap, unrehearsed) |
| spur-of-the-moment(adjective, free, informal, casual, snap) |
| take for a ride(verb, expression, idiom, trick, fool) |