“To give oneself away” in Japanese
Short answer
To give oneself away in Japanese is “馬脚を現す” (bakyakuwoarawasu). Full meaning: to reveal one's true nature, to show one's true colours, to give oneself away, to be exposed (of a lie, etc.).
Other ways to say “To give oneself away” in Japanese
尻尾を出す
shippowodasu to show one's true colors (colours), to expose one's faults, to give oneself away
お里が知れる
osatogashireru to reveal one's (poor) upbringing (through poor manners, etc.), to betray one's origin, to give oneself away
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