I tried to keep the shit-eating grin off my face as nothing happened.

He had such a shit-eating grin on his face that Sara felt tempted to do it herself.

With a huge shit-eating grin, he turned over a monster.

His shit-eating grin told her the truth of the matter.

Go with it, he told himself, and he broke out into a big shit-eating grin.

I just smiled my shit-eating grin at them and said thank you.

The guidance counselor kept this shit-eating grin for when she passed me in the hall.

But none of those had put the shit-eating grin on Taggart's face.

The dealer handed him the keys with a shit-eating grin.

Beyond the door, he found John Conrad wearing a wide shit-eating grin.