Learn how to say Clams correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word clam:
any of various burrowing bivalve molluscs of the genera Mya, Venus, etc. Many species, such as the quahog and soft-shell clam, are edible and Tridacna gigas is the largest known bivalve, nearly 1.5 metres long
the edible flesh of such a mollusc
(informal) a reticent person