How to say "flip-flop" in Japanese

• 手のひらを返すてのひらをかえす
  expression, godan verbAn idiomatic verb phrase, literally 'to flip over one's hand': it describes someone abruptly reversing their attitude or opinion. A less common match for 'flip-flop'; use it when 'flip-flop' works as a verb.
• 双安定トリガ回路そうあんていトリガかいろ
  nounThe circuit sense only: this means a bistable trigger circuit in electronics, never a reversal of opinion or attitude; it is a less common match for the English word.
• 双安定回路そうあんていかいろ
  nounAlso names the flip-flop circuit in electronics, equivalent to 双安定トリガ回路 but without spelling out the trigger function; it too never refers to reversals of attitude, and is likewise a less common match.
• 手のひら返してのひらがえし
  noun, suru verb, intransitive verbThe noun counterpart of 手のひらを返す: a sudden reversal of behavior, opinion, or attitude. Use it when 'flip-flop' or 'about-face' stands as a noun; like the verb, it is a less common match.

For the electronics sense choose 「双安定トリガ回路」 or 双安定回路; for an abrupt reversal of attitude, opinion, or behavior choose the verb 「手のひらを返す」 or the noun 「手のひら返し」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 手のひらを返すてのひらをかえすto flip-flop
• 双安定トリガ回路そうあんていトリガかいろbistable trigger circuit
• 双安定回路そうあんていかいろbistable (trigger) circuit
• 手のひら返してのひらがえしsudden reversal (of behavior, opinion, attitude, etc.)