The story
From /pol/ - Politically Incorrect, an imageboard on 4chan; and the word Polack, a slur used against Polish people that depicts them as backwards.
Etymology from Wiktionary, CC BY-SA 4.0.
/pol/lack
Today it means: A habitual poster on the /pol/ - Politically Incorrect board on 4chan; a member of the /pol/ community. Full definition →