12 letters · 36 points in Scrabble
noun disagreeable aftereffects from the use of drugs (especially alcohol)
noun loud confused noise from many sources
originBorrowed from German Katzenjammer (“hangover”, literally “the wailing of cats”); a determinative compound formed from Katze (“cat”) + -n- + Jammer (“wailing; lamentation”).
Etymology from Wiktionary, CC BY-SA 3.0