think nothing of

think nothing of idiom
  1. Give little consideration to, regard as routine, as in He thinks nothing of driving 100 miles to see a new movie. [c. 1800]
  2. think nothing of it. It's not important, as in Thanks for the lift.—Think nothing of it. This way of saying you're welcome dates from the late 1800s.

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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