godan verb (-su), transitive verb
slap hard; knock flying; send sprawling
Emphatic: to hit someone so hard they are knocked off their feet or sent flying. Often used in rough or dramatic contexts.
彼は相手を張り飛ばした。
He slapped his opponent and sent him flying.
あんなに強く張り飛ばされたら、誰でも倒れるよ
If you get slapped that hard, anyone would go down.