Malapropism
/ˈmæləprɑːpɪzəm/
Definition 1 of 1
Pro Tip 1/3Humor Indicator
Malapropisms are often used in comedy to make characters seem humorous or endearingly flawed. 
The character's malapropism caused the audience to erupt in laughter.
Pro Tip 2/3Unintentional Humor
People may use malapropisms by accident, which can lead to unintentional humor in serious conversations. 
His malapropism had everyone giggling during the serious meeting.
Pro Tip 3/3Literary Device
Writers use malapropisms in literature to add depth to their characters or to create a specific tonal effect. 
The author's use of malapropism gave the character a distinct voice.