It was like a man swatting at a fly, with great strength.

It would also be like swatting at a fly on the back of Federal bureaucracy.

He slammed violently at a fly settling on his neck.

He swatted at a fly that landed on the back of his neck.

Occasionally its lid would snap at flies, but without much enthusiasm.

He avoided her eyes and flicked at a fly that was buzzing close to his head.

Father goes absolutely mad if Timmy suddenly snaps at a fly.

Ruth stared at a squashed fly high on the opposite wall.

She waved a hand like she was batting at flies and began to walk away.

He could see a couple of big trout sunning in the water, snapping at flies.