The term 'go postal' is an idiom that is used to describe someone who has become extremely angry and out of control. It is often used to describe a person who has become so angry that they have lost their temper and are behaving in a violent or irrational manner. The crossword solutions for this term are SNAP (4 letters), FREAKOUT (8 letters), FLIP (4 letters), RAGE (4 letters), and LOSEIT (6 letters). SNAP is a verb meaning to make a sudden, sharp sound. FREAKOUT is a noun meaning a sudden outburst of intense emotion. FLIP is a verb meaning to turn over or cause to turn over with a sudden quick movement. RAGE is a noun meaning violent, uncontrollable anger. LOSEIT is a verb meaning to become extremely angry or agitated.