1clam 
/ˈklæm/ noun
plural clams /ˈklæm/ noun 1 [count] : a type of shellfish that lives in sand or mud, has a light-colored shell with two parts, and is eaten both cooked and raw
▪ steamed clams ▪ clam chowder — see color picture 2 clams [plural] US slang, somewhat old-fashioned : dollars
▪ He won 20 clams [=(more commonly) bucks] playing poker.
▪ steamed clams ▪ clam chowder — see color picture
▪ He won 20 clams [=(more commonly) bucks] playing poker.
(as) happy as a clam
US, informal : very happy
▪ She spent the afternoon reading and was as happy as a clam.
▪ She spent the afternoon reading and was as happy as a clam.
