Cheapskate is a very informal word that's always used in a negative way, as an insult. Example: Some cheapskate left me a quarter and two pennies as a tip today.

What cheapskate means?

: a miserly or stingy person especially : one who tries to avoid paying a fair share of costs or expenses. Synonyms Example Sentences Learn More About cheapskate.

Is boastfulness a word?

Meaning of boastfulness in English

a way of talking in which you praise yourself and what you have done: He speaks with honesty rather than boastfulness.