Not Think Twice

Negative variation of the idiom to think twice.

Meaning of Idiom ‘Not Think Twice’

To not think twice means to do something spontaneously and quickly without considering it very much or worrying about the consequences. 1Ammer, Christine.  American Heritage Dictionary of Idioms. Boston: Houghton Mifflin Harcourt, 2013.,2Heacock, Paul. Cambridge Dictionary of American Idioms. Cambridge: Cambridge UP, 2010.

Examples Of Use

“I didn’t think twice before taking the job. I’ve been wanting to work for this company for years.”

“I didn’t really think twice,” said the young man. “I saw the house on fire and just ran in to make sure nobody was in there. Anybody would have done the same thing.”

“Doug doesn’t think twice about leaving town for a couple of days without even telling anyone where he’s going. He calls it being spontaneous. I call it being irresponsible.”

Origin

A negative variation of the idiom to think twice, this expression has been used since the mid-1900s.

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Sources   [ + ]

1. Ammer, Christine.  American Heritage Dictionary of Idioms. Boston: Houghton Mifflin Harcourt, 2013.
2. Heacock, Paul. Cambridge Dictionary of American Idioms. Cambridge: Cambridge UP, 2010.