Use "self-conceit" in a sentence

1. 1600) through shortening of self-Conceit (1580s).

2. His oily, insinuating tones, his greasy smile, and his monstrous self - conceit grated on my nerves.

3. 1782–1785, William Cowper, “ (please specify the page) ”, in The Task, a Poem, [ …], London: [ …] J [oseph] Johnson; [ …], OCLC 228757725: inflated and Astrut with self-conceit