/gu:n; ˇun/
n (infml 口)
(a) stupid or crazy person 傻子; 狂人.
(b) (US) person employed to threaten or attack people （雇佣的）打手.

n[C]informal
[Date: 1800-1900; Origin: Partly from gooney 'stupid person' (16-19 centuries); partly from Alice the Goon, character invented by the U.S. cartoonist E. C. Segar]
especially BrE a silly or stupid person
especially AmE a violent criminal who is paid to frighten or attack people