Malapropism (noun)

An act or habit of misusing words ridiculously, especially by the confusion of words that are similar in sound.

Origin:

Mid 18th century, from the name of mrs. malaprop, a character in richard brinsley sheridan's play the rivals (1775), who was noted for her comically absurd misuse of words.

Examples:

1. The politician's malapropism caused widespread laughter.
2. Her malapropism was so frequent that it became the subject of jokes.
3. The actor's malapropism ruined the credibility of the character.
4. The student's malapropism showed that they had not studied the material thoroughly.
5. The malapropism was an embarrassing mistake in an otherwise flawless speech.