I didn't understand the first sentence (על ידי פתוי??). Where did you hear this sentence? I didn't understand the second sentence too, but the word "מסריח" also means that something is unfair. So is it makes sense? And about the last sentence - it is not a phrase but the meaning is that someone showed his happiness. * An xample to the word "מסריח" as unfair: עשית לנו תרגיל מסריח ** You can also say: לעסקה הזאת יש ריח לא טוב if you want to say that you think that this deal is unfair or a scam