How to see if somebody is a skinflint

Also known as Jews,damn them.

1.Doesn't leave a tip,
I used to work as a waiter and some people,not so many,never left a tip even though they came there almost every night.

2.At the restaurant when the bill come they look after flies or go at the toilet and jump out the window,hopefully the restaurant is a the 9th floor.

3.Sucks the blood out of the mosquito.

4.If he doesn't forget his wallet home them he'll probably say somebody stole it from him.

5.Has a double digestive system.