He looked at Blake and smiled his idiotic grin.

"Went to pick mushrooms," Chris said, with what he hoped was an idiotic grin.

Then it went away and was replaced by an idiotic grin.

So unless you've got a foolproof solution, don't come around here with that idiotic grin on your stupid face, telling me what I already know!

Cheesewright gave them an idiotic grin and rolled his eyes.

Still grinning his idiotic grin he sidled past me and out.

Michael grinned at him, a sort of inane idiotic grin, that Biggs had never seen before.

He had an idiotic grin on his face, and his eyes were closed.

"I'm sure you're right," Rayburn said, showing his most idiotic toothy grin.

And she found herself for no reason grinning a large idiotic grin.