to be overly excited or enthusiastic about something

Let's go party time.

Verb:

1) Getting loose, being wild and potentially engaging in sexual activity with members of the opposite gender (or the same gender if thats what you're in to)
2) Acting crazy due to consumption of large amounts of alcohol, marijuana, molly or other drugs
It can be used as a noun where it is spelled "turnt up" instead of "turned up" as grammatical conventions would suggest. Turnt up is used to described the state of being wild and crazy like someone would be at a party.

It is not to be confused with the vegetable, the turnip, to which it shares some phonic similarities but is otherwise entirely unrelated

Raised your energy and enthusiasm; get excited; have a good time crunk

To be drunk, or to be intoxicated

To increase the amount of drugs/alcohol in the body in order to increase the possibility of having a good time at a social gathering and or by oneself.