The story
From /pol/ - Politically Incorrect, an imageboard on 4chan. Taken from political to indicate /pol/'s main theme. Portmanteau with retard.
Etymology from Wiktionary, CC BY-SA 4.0.
/pol/tard
Today it means: A habitual poster on the /pol/ - Politically Incorrect board on 4chan; a member of the /pol/ community. Full definition →