I'm still asking my dad for money
Why are you asking him for money?
I cant say, I will be grounded he he found out.
Asking for some money from a parent as a kid isn't that unusual but it can also be good to help yourself by having a job. On another topic though maybe if the money is for something bad, you shouldn't be doing it.
What if I come up with a really good reason?
If you know he will be angry and ground you maybe you should not ask for the money. It sounds like you might be doing something illegal, don't you think he might find out eventually?