put behind one
Try to forget, make an effort not to be bothered by, as in He had to put that failed negotiation behind him and make a fresh start. [Mid-1800s]
The Mystery Behind April’s NameWhile the first day of the fourth month of the year is sure to bring plenty of shenanigans, what isn't so certain is where the month's name originated.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.