What is Carry It?
1.
This term refer to handle it, go about it or do it. It being what ever the subject is at hand.
Judy and Mary are argueing again. How should we carry it?
See
2.
To tell someone to get out of your face and leave. The idea is that you're telling them to take their personal baggage (i.e. Carry) and get out of your presence.
You best "carry it" on out of here.