Going 'NUTS' is an expression used to describe someone who has become extremely angry or excited. The crossword solutions for this term include RAGE (4 letters), RAMPAGE (7 letters), FLIP (4 letters), SNAP (4 letters), LOSEIT (6 letters), CRACKUP (7 letters), FLIPOUT (7 letters), RUNAMOK (7 letters), RUNWILD (7 letters), LETLOOSE (8 letters), and LOSEONESMARBLES (15 letters). All of these words describe a person who has become unhinged, either through anger or excitement.