"Hey professor," Jack grumbled as he strode into the hut.

"Got no one in this place to be bitter with any more," Jack grumbled.

An example could be: Jack's boss did not give him the promotion, so Jack grumbled to himself in frustration.

Jack grumbled about that-they'd be old news by then-but it's not exactly like buying a car off the lot.

Jack grumbled a bit, but there wasn't much he could do about it.

Jack grumbled a bit but promised to hang on.

"Strange how we can see that train coming for someone else but not ourselves," Jack grumbled.

"I don't like the way none of it reads," grumbled Happy Jack.

Isn't that just great, Jack grumbled to himself.

"I ain't no horse coddler," Jack grumbled, but did as he was told, and in a few minutes the coach began to move again.