From Longman Dictionary of Contemporary Englishgrin and bear itgrin and bear itSTAND/BEARto accept an unpleasant or difficult situation without complaining, usually because you realize there is nothing you can do to make it better → grin
Examples from the Corpus
grin and bear it• Abu Salim decided that a third day wasn't necessary so I had to grin and bear it.• And up to now, you've had to quit or grin and bear it.• But she was not on the tour, so I had to grin and bear it.• It's not exactly affectionate, but we Limeys can grin and bear it.• There was no alternative but to grin and bear it.• We just have to grin and bear it.• After debate the team concluded that they had to grin and bear it rather than descend into paranoia. 