3.technicalSG a narrow opening in tall rocks or cliffs that you can climb up 〔岩石或悬崖间可容人攀登的〕裂口,裂缝
4.smoke like a chimneyif someone smokes like a chimney, they smoke a lot of cigarettes or tobacco – used humorously 烟瘾很大〔幽默用法〕
Examples from the Corpus
smoke like a chimney• She's only thirteen and she already smokes like a chimney.• The only sadness was that they all appeared to smoke like chimneys.• My granddad, who smoked like a chimney and lived to 97, was lucky enough never to encounter a promoter.