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Longman Dictionary of Contemporary English
self-deprecating
adjective
COLLOCATIONS FROM OTHER ENTRIES
self-deprecating humour (=jokes, funny stories etc in which you criticize or make fun of yourself)
▪ Her self-deprecating humour made the audience howl with laughter.
EXAMPLES FROM OTHER ENTRIES
self-deprecating humor
EXAMPLES FROM CORPUS
▪ Always self-deprecating and modest, he fought bravely a long struggle against cancer, remaining cheerful and full of amusing unrepeatable anecdotes.
▪ But he often greets strangers with self-deprecating humor and a boyish enthusiasm that is not without charm.
▪ He made perfect, self-deprecating jokes and gracious presentations.
▪ His eyes danced, his self-deprecating humor worked and his arms and fingers lunged in all directions for effect.
▪ Jones also has a very self-deprecating sense of humour.
▪ The nice thing about him is his self-deprecating manner.
▪ This time Laimonis's self-deprecating laugh does not cover the pain, and something else, hostility perhaps.
Douglas Harper's Etymology Dictionary
self-deprecating

1835, from self- + deprecating (see deprecate).

Wiktionary
self-deprecating

a. expressing disapproval or being critical of oneself, especially modestly or humorously so.

WordNet
self-deprecating

adj. conscious of your own shortcomings

Usage examples of "self-deprecating".

On weekends he would be seen paying out in the pubs around East London and Essex with a smile and his self-deprecating wit.

They were just two Air Force guys joshing with the other pilots, self-deprecating, almost witty.

Which is ridiculous, because Mark is totally perfect husband material, being completely sweet and thoughtful and funny and self-deprecating and totally the opposite of his horrible friend Cal the Modelizer in every way.

If it hadn't been for those damn' meddlesome posthumanists –" Her wrinkled, unnaturally aged face scowls at him furiously from underneath hair that has faded to the color of rotten straw, but he senses a subtext of self-deprecating irony that he doesn't understand.