Restlessness or irritability when trying to reduce or stop gambling.
After losing gambling money, often comes back another day to get revenge ("chase" someone's loss).
Not yielding. A characteristic we humans have, then being rebellious and want to chase the loss even if it means to cost anything/everything we have.
Gamblers who are habitually doing it everyday will have lots of signs once they miss a day without doing it.
It's similar to those drug addict that is confused about what to do for the whole the day without the pill, in this case their game in gambling.
This kind of people badly needs help unlike those who do it occasionally who are mostly just having fun.