letting ones hair down (verb) play: have fun
Sinonime: betwixt and between,
changing,
doubtful, faltering,
hesitant, hesitating, hot and cold,
incomplete,
indecisive,
irresolute,
moot, open to question,
pending, problematical, pussyfooting, unanswered, unconcluded,
undecided, undetermined, unfinished,
unsettled, unsolved, up in the air,
vacillating,
vague, waffling
Antonime: certain,
definite, resolved,
settled, solved,
sure