Meaning of a sentence!

[zoobinshid]

Hello everybody,
Would you please tell me the meaning of this sentence?
(To go up with somebody )

Thanks in advance,

[mykwyner]

To get up with someone means to contact them, to be in communication.

I got up with Mary after you left and told her all about you.

To go up with someone usually means to accompany them.

Can I go up with you to the mall?

In these cases, the word [I]up[I] is not functioning as a preposition, but as a particle whose placement in the sentence is more or less superfluous.

Other examples are: Meet up, and start up