Это слово маскирует бранное непристойное "за...бись" . Значение надо знать, а вот употреблять не сто́ит. Зашибись ≠ ≠ ≠ It doesn't "Wow!" or "Cool"

Of course you can use this word, it sounds just fine to me and it's appropriate for a particular situation. It sounds less rude than "that's fucking awesome" but means the same. The word "заебись", for example, sounds way ruder. There are some very rude words that are replaced by softer ones so as not to sound really rough, like this: заебись becomes зашибись; пиздец becomes пипец; ахуеть becomes офигеть; ахуенный becomes офигенный. The second variants are frequently used on TV, so you can use them, too.

It's like "Wow!" or "Cool". Also it means smth unbelievable, amazing awesome)

Это удивление - surprise:)

it depends on context. Usually it means Super! Sometimes it uses to show frustration