kook in Czech
kook in Czech
blázen
(slang, chiefly, US) An eccentric, strange or crazy person.
podivín
(slang, chiefly, US) An eccentric, strange or crazy person.
mimoň
(surfing, kiteboarding, wakeboarding) A boardsport participant who lacks style or skill; a newbie who acts as if they are better at the sport than they are.