The term 'Wild and Crazy Guy' can be described by the crossword solutions of FANATIC (7 letters), NUT (3 letters), LUNATIC (7 letters), MADMAN (6 letters), ZANY (4 letters), and MANIAC (6 letters). These words all refer to someone who is unhinged, eccentric, and unpredictable in their behavior. A FANATIC is someone who is extremely devoted to a cause or activity, while a NUT is someone who is considered to be crazy or eccentric. A LUNATIC is someone who is mentally unstable, and a MADMAN is someone who is driven by irrational impulses. A ZANY is someone who is comically wild and unpredictable, and a MANIAC is someone who is uncontrollably violent or frenzied. All of these words together paint a picture of someone who is wild and crazy.