Lose (one's) tongue phrase
To suddenly get into the condition of not being able to speak due to fear or shock.
When my best friend made allegations of swindling against me, I lost my tongue.
I would hazard a guess that our ancestors would lose their tongue if they could witness some of our modern-day technologies.
I lost my tongue when finding that the company in which I invested had just been creating the entirely spurious impression that it was thriving.
The verb "lose" must be conjugated according to its tense.
The origin of this phrase is not clear.
To do domething based on your emotions rather than for rational reasons
I can't believe that Tom beat his classmate. He's always the one who let his heart rule his head.