grin and bear it

: to draw back the lips so as to show the teeth especially in amusement or laughter

: a facial expression produced by grinning especially in pleasure or amusement

: any of a family (Ursidae of the order Carnivora) of large heavy mammals of America and Eurasia that have long shaggy hair, rudimentary tails, and plantigrade feet and feed largely on fruit, plant matter, and insects as well as on flesh

: a surly, uncouth, burly, or shambling person

: one that sells securities or commodities in expectation of a price decline — compare bull

: to accept or allow oneself to be subjected to especially without giving way

: to call for as suitable or essential

: assume, accept