From Wiktionary, the free dictionary
Blend of twit + witticism
twitticism (plural twitticisms)
- A stupid saying, characteristic of a twit
1988 May 27, Lawrence Bommer, “Tom and Viv”, in Chicago Reader[1]:Jim Zulevic plays Viv's conformist brother ("The bohemian life is dicey" and "Life is thin," among his twitticisms).