What is another word for letting fly at?
Pronunciation: [lˈɛtɪŋ flˈa͡ɪ at] (IPA) 
"Letting fly at" is a phrase that often describes a sudden outburst of anger or frustration. If you're looking for synonyms to replace this expression, there are several options worth considering. One alternative could be "lashing out at," which conveys a similar sense of aggression towards someone or something that's causing distress. Similarly, "venting" or "unleashing" could be used to describe the release of pent-up emotions. "Ranting" or "raving" might also work well in certain context, particularly if the speaker is particularly agitated or upset. Ultimately, the choice of synonym will depend on the specific situation and tone of the message that you're trying to convey.
