not think twice about (something)

To do something without worrying or stopping to consider the consequences, perhaps hastily and recklessly. She didn't think twice about getting on the train and going to Spain with him. When life gives you great opportunities, you can't think twice about seizing hold of them.

See also: not, think, twice

See also:

snap decision
take the ball before the bound
snap judgment
chuck (something) into (something)
chuck into
shoot from the lip
on impulse
shoot from the hip
fire from the hip
hip-shooter

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