| down(adjective, simple, natural, casual, impulsive) |
| emotional(noun, thoughtless, impetuous, unwary) |
| erratic(chance, unplanned, accidental, unpremeditated, inadvertent) |
| faked(fake, unprepared, unplanned, unrehearsed, unscripted) |
| fortuitous(chance, unplanned, accidental, unpremeditated, inadvertent) |
| free(adjective, simple, natural, casual, impulsive) |
| free spirited(expression, adjective, simple, natural, casual) |
| freewill |
| from the hip(expression, adjective, idiom, simple, natural) |
| gone off deep end(expression, idiom, thoughtless, impetuous, unwary) |
| headlong(noun, thoughtless, impetuous, unwary) |
| hot-and-cold(thoughtless, impetuous, unwary) |
| improv(adjective, free, fake, casual, spontaneous) |
| improvisatorial |
| inadvertent(unplanned, accidental) |
| indeliberate |
| inevitable(adjective, simple, natural, casual, impulsive) |
| irresistible(adjective, simple, natural, casual, impulsive) |
| jamming(adjective, free, casual, impulsive, spontaneous) |
| jumping the gun(expression, idiom, thoughtless, impetuous, unwary) |