She grinned up at him, a lopsided and uncertain grin.

Neil, still fidgeting, gave him an uncertain grin.

He offered her an uncertain grin, and she couldn't help contrasting it with her father's.

B'Elanna snatched her hand away from Tom, who wore a weak, uncertain grin.

I gave him an uncertain grin for his trouble, and took his still-warm seat, opposite Keeler.

But then, seeing her smile, he gave her an uncertain grin.

The Texan looked up at him with an uncertain grin.

And Nob again showed his guns in an uncertain grin.

He gave me a quick, uncertain grin.

"You didn't let me get to it," Stef reminded him, with an uncertain grin.