tailpipe
From Longman Dictionary of Contemporary EnglishRelated topics: Motor vehiclestailpipetail‧pipe /ˈteɪlpaɪp/ noun [countable] American EnglishTTC a pipe on a vehicle or machine through which gas or steam passesExamples from the Corpustailpipe• Junior Hanson was famous for not knowing a tailpipe from a stovepipe.• In some increments the Calibra shows the way, while in others the Corrado shows the Vauxhall a lead-free tailpipe.• I put a potato in his tailpipe.• From what goes into a vehicle to what comes out its tailpipe, Arizona lawmakers have not leaned on diesel.