Definition
This idiom suggests that sarcasm is a crude and unkind form of humor, often considered the least sophisticated type of wit.
When he used sarcasm to comment on my work, I knew he didn't truly appreciate my efforts.
She often uses sarcasm to mask her true feelings, but it's not a great way to express herself.
I believe sarcasm is the lowest form of wit because it often hurts the feelings of the listener.