toss a coin
flip a coin

You could toss a coin as to which was the best course of action.

He would toss a coin on the desk before them.

He tossed a coin on the bar and walked out.

They had tossed a coin to see who got the extra 1.

Like tossing a coin to decide on a man's life.

Two girls passed by and tossed coins into his small plastic cup.

Next he tossed a small coin on to the coffin.

He tossed a coin on the table and went back into the dusk.

A good way to test this is to toss a coin into the pool.

Anxious to be off, he tossed coins on the table.