1
general::
Phrase(s): lash out (at someone or something) [and] lash out (against someone or something)
to strike out in defense or attack—physically or verbally. • Amy was angry with Ed and lashed out at him just to show who was boss. • She was so angry with him that she just lashed out against him. • Gretchen was fed up with the cat and lashed out savagely in her anger.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
Make a sudden blow or fierce verbal attack. For example, The mule lashed out with its hind legs, or After listening to Dad's criticism of his driving, Arthur lashed out at him. [Second half of 1500s]
American Heritage Idioms