Quiz: Remember the definition of mal de mer?
1903, possibly from dialectal yip "to cheep like a bird" (early 19c.), from Middle English yippen (mid-15c.), of imitative origin.
[origin uncertain; perhaps coined because of the increasing currency of the Chinese term yin and yang, ''the female and male principles in nature,'' influenced by wang, ''penis''; perhaps fr Louisiana French yan-yan, ''ass'']