indulge in (something)
1. To do something for one's own pleasure or enjoyment. We try to be responsible with our money, but we do indulge in a fancy night out every once and awhile.
2. To eat or drink something in particular, often something that is not especially healthy. Oh, I'm definitely indulging in a big piece of cake on my birthday!
indulge in something
1. to take pleasure in doing something; to do something habitually. No, I don't indulge in contact sports anymore. We don't indulge in strenuous activity.
2. to choose to eat a certain food or drink something, usually alcohol. I don't usually indulge in hard spirits, but just this once. I indulge in chocolate until I can't hold any more.
indulge in
v. To engage or take part in something, especially freely, avidly, and for one's own sake or pleasure: The college students indulged in childish pranks. Those teenagers indulge in all the latest fads.