very happy. From the phrase happy as a clam at high tide, which comes from the fact that clams, considered a delicacy in America, are gathered only at low tide. In other words, a clam would be happy at high tide because it would not be being gathered for food. —HEV Approved Glossary, —3rd South African unpublished Appr GLS (19.3.92), —3rd South African published appr gls (14.4.92), —Perception of Truth Approved Glossary (9 June 92)