machinegunner
A guy or girl who likes to finger two girls at once like they're enemies in a war and his fingers are the bombs.
At the party, he was the machinegunner. Girls were screaming like he was actually shooting them.
My friend's girlfriend called him a machinegunner. He took it as a compliment.
He used his fingers like a machinegun. Both girls were mad. One was still mad the next day.