The phrase "give broadside" is often used to describe a situation where someone has exposed themselves to criticism or attack, usually unintentionally. Synonyms for this expression would include "leave oneself vulnerable," "open oneself up to attack," or "give someone ammunition." Other related phrases might include "paint a target on one's back," "lay oneself open to criticism," or "throw oneself under the bus." Regardless of the specific synonym used, the meaning remains the same - that someone has made a mistake or acted carelessly, and as a result, has left themselves open to criticism or attack.