My Mother.
Ugh. It is embarrassing to go into a restaurant with her. She will order something, say it is wrong and then say she is a senior to get a discount. She will take the packets of sugar, salt, etc. Everything people have listed my Mom has done.
Tips? She does not believe in them. I will leave extra money because she will leave $1-2 dollars on a $30-40 dollar bill. She gets mad at me for leaving them money. I can't believe how cheap she is.