Definition from Wiktionary, the free dictionary
leming m anim
- (derogatory) yeasayer, doormat, sheeple; someone who uncritically agrees with popular opinion or the status quo
- (politics, derogatory) stereotypical centrist voter, especially a middle class Civic Platform voter
In the sense "centrist voter", the term is used as an epithet mainly by right-wing press.
declension of leming
leming m (plural lemingi)