1.A dunce; a stupid fellow.
Booby hatch (a)(Naut.), a kind of wooden hood over a hatch, readily removable.
(b), an insane asylum. (Colloq.)
Booby trap (a), a schoolboy's practical joke, as a shower bath when a door is opened.
(b), any concealed device causing surprise or injury when a usually harmless object is touched; in military operations, typically containing an explosive charge.