Another word used for calling one a retard! A commonly used Irish phrase!
Sherup ya bleedin johnner! That guy has a fierce look of a johnner about him!
by Sancho The legend! July 25, 2009
1 more definition
Members of St John Ambulance tend to refer to each other as St Johnners or simply Johnners.
He's my Johnner friend!
by indianaprincess January 03, 2011