lockjaw
From Longman Dictionary of Contemporary EnglishRelated topics: Illness & disabilitylockjawlock‧jaw /ˈlɒkdʒɔː $ ˈlɑːkdʒɒː/ noun [uncountable] informal MItetanusExamples from the Corpuslockjaw• He's trying so hard to force his teeth through that wodge of food he's in danger of developing lockjaw.• They haven't stopped smiling for at least two decades, which suggests an extremely bad case of lockjaw.