The phrase "crazy like a fox" may refer to:

• Crazy like a Fox (1926 film), a 1926 film starring Charley Chase
• Crazy Like a Fox (1944 book), book by writer/humorist S.J. Perelman; usage gained popularity after his book.
• Crazy Like a Fox (TV series), an American television series (1984–1986)
• Still Crazy like a Fox, a 1987 American television movie that was a spinoff of the television series
• Crazy like a Fox (2004 film), a dramatic comedy starring Roger Rees
• "Crazy like a Fox", the opening song from the Keith Moon album Two Sides of the Moon

• Protein in nutrition
• Protein interactions
• Protein I-sites
• Protein JTV-1
• Protein ka
• Protein kc
• Protein K (disambiguation)
• Protein Kinase
• Protein kinase a
• Protein kinase, AMP-activated, alpha 1
• Protein Kinase C
• Protein kinase C, zeta
• Protein kinase C zeta/Protein kinase M zeta
• Protein kinase D1
• Protein kinase domain
• Protein kinase g
• Protein kinase Mz
• Protein kinase Mζ
• Protein kinase N1
• Protein ligands
• Protein ligation
• Protein malnutrition
• Protein Man
• Protein misfolding
• Protein module