WordWeb Online

1. Someone who is a stupid incompetent fool
   - fathead [informal], goof [informal], goofball [N. Amer, informal], jackass, goose [informal], cuckoo, zany
    
2. An adult person who is male (as opposed to a woman)
   - man, adult male, geezer [Brit, informal], guy [informal], cat [N. Amer, informal], hombre [Brit, N. Amer, informal], sod [informal], chappie [Brit, informal]

Derived forms: bozos

Type of: adult, boofhead [Austral, informal], charlie [Brit, informal], diddy [Brit, informal], dill [Austral, NZ, informal], drongo [Austral, NZ, informal], fool, galah [Austral, informal], grownup, juggins [Brit, informal], jughead [N. Amer, informal], male, male person, mampara [S.Africa, informal], meathead [informal], moegoe [S.Africa, informal], muggins [Brit, informal], nit [Brit, informal], sap [N. Amer, informal], tomfool

Encyclopedia: Bozo, The World’s Most Famous Clown