狗窦大开

dog hole wide open (idiom); fig. gap caused by missing teeth (used mockingly)

dog / CL:隻|只[zhi1],條|条[tiao2]

dog hole / gap caused by missing teeth / fig. den of thieves

surname Dou

hole / aperture / (anatomy) cavity / sinus

see 大夫[dai4 fu5]

big; large; great / older (than another person) / eldest (as in 大姐[da4 jie3]) / greatly; freely; fully / (dialect) father / (dialect) uncle (father's brother)

to open wide

to open / to start / to turn on / to boil / to write out (a prescription, check, invoice etc) / to operate (a vehicle) / carat (gold) / abbr. for Kelvin, 開爾文|开尔文[Kai1 er3 wen2] / abbr. for 開本|开本[kai1 ben3], book format