Noun

(-)

A lack or absence of gratitude; thanklessness.

* {{quote-book, year=1905, author=

, title= , chapter=1 citation , passage=“Mrs. Yule's chagrin and horror at what she called her son's base ingratitude knew no bounds ; at first it was even thought that she would never get over it. […]”}}

* 1966 , Age & Scarpelli, Sergio Leone, and Luciano Vincenzoni (writers), Sergio Leone (director), Clint Eastwood (actor), (movie), Produzioni Europee Associati:

Blondie: Tut, tut. Such ingratitude after all the times I saved your life.