good for you, him, etc.

good for (someone or something)

1. Having a positive effect on someone or something. More sunlight will be good for your drooping plants.
2. Able to pay a debt owed. I'm good for the money, don't worry. I'll get it to you first thing tomorrow.
3. Able to work or function. I know it's a used car, but I think it's good for a few more years.
4. Valid or in effect. How long is this warranty good for? Is this coupon really good for 50% off our total purchase?
5. An expression of approval or support of someone for something they have done or accomplished. I heard you got the promotion—good for you! Good for him, getting an A in that difficult class.
See also: good

ˌgood for ˈyou, ˈhim, etc.

(especially AustralE good ˈon you, him, etc.) (informal) used to praise somebody for doing something well: ‘I’ve decided to give up smoking as from tomorrow.’ ‘Good for you, Philip.’‘He’s saving up his pocket money to buy a football.’ ‘Good for him.’
See also: good