To grin and bear it is to put up with something unpleasant without complaint. Just grin and bear it.
It is advice given by whoever is not suffering, which is why it can grate. To grin and bear it is sound where nothing can be changed and useless where something can.
1phrasegrin and bear itTo put up with something unpleasant without complaint.
“There was nothing to do but grin and bear it until the spring.”
grin and bear it is a phrase.
Practised in Idioms