Also Inflected form of slur slurred slur·red US/ˈslɜrd/ uncommon adjective 1. spoken as if with a thick tongue “the thick speech of a drunkard” “his words were slurred” Synonymsthick Similarunintelligible WordNet 2.1 (Princeton University). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved.