1
general::
Phrase(s): think nothing of someone or something
Go to think little of someone or something., Phrase(s): think nothing of doing something
to give no thought or hesitation to doing something. • She thinks nothing of helping other people at any time of day or night. • Toby thinks nothing of driving one block to the store.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
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.
American Heritage Idioms