schlump /ʃlʌmp/noun 1verb 1forms 3 noun1 •(slang) Someone who is lazy, slovenly, or dull-looking.Leave the schlumps behind. You can't hope to find Mr. Right but continue to see Mr. Not-on-Your-Life. — 2009 verb1 •(slang) To move in a heavy, lazy or slovenly way. formsschlumped · schlumping · schlumps