To snipe means to shoot someone from a hidden place, especially in a war or a game.
Sniping can be seen as sneaky or clever, but also dangerous and not very fair.
Examples:
The soldier sniped the enemy from behind a tree.
In the game, I like to snipe the bad guys from far away.
She sniped the target from the top of the building.
I sniped my brother in our game, but he didn't see me!
The sniper sniped the bad guys from very far away.
He always snipes the other team and wins the game.