stick head above the parapet
put/stick (your) head above the parapet
to be brave enough to state an opinion that might upset people.
Kearton was one of the very few to put his head above the corporate parapet and speak his mind in public.
stick head above the parapet
put/stick (your) head above the parapet
to be brave enough to state an opinion that might upset people.
Kearton was one of the very few to put his head above the corporate parapet and speak his mind in public.
Cambridge English Idioms Dictionary