Exceedingly flat, sometimes excessively so. This simile has been around since the sixteenth century, appearing in Nicholas Udall’s translation of Erasmus (1542) and Henry Porter’s play The Two Angrie Women of Abington (1599, 2.3). Morever, it survived and replaced the equally old flat as a flounder and is still frequently used today, often in deprecating fashion to describe a woman’s lack of mammary endowment.