overhappy

From over- +‎ happy.

overhappy (comparative more overhappy, superlative most overhappy)

1. Exceedingly happy.
   • c. 1599–1602 (date written), William Shakespeare, “The Tragedie of Hamlet, Prince of Denmarke”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, →OCLC, (please specify the act number in uppercase Roman numerals, and the scene number in lowercase Roman numerals):

     Happy, in that we are not overhappy; / On fortune's cap we are not the very button.