Meanings
colloquialwow, ugh; An expression of annoyance or exasperation or disgust.
Boah, halt die Klappe!Jeez, shut up!
colloquialwow, damn; An expression of marvel or surprise.
Boah, is der groß!Whoa, that one's big!
Examples
GermanEnglish
Boah, Daniel hat ziemlich viel zugenommen, seit ich ihn das letzte Mal gesehen habe.Wow, Daniel has put on a lot of weight since the last time I saw him.
Boah, Sie müssen mal das Ding in die Reinigung bringen.Whoa, you have to take that thing to the dry cleaners.