What does this phrase mean: "Hang on!" Any ideas?

[eng]

What does that mean, when someone keeps saying:
hang on! hang on! ?

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[Torsten]

Well, depending on the context it can means several things:

- wait a second
- depend upon
- support

So, maybe you can give us the sentence in which you came across that phrasal verb?

TOEIC short conversations: Two friends meeting at the subway talking about transport options.

[Vietanhpham_Winter]

yeah it means wait, calm down...
_________________
Nothing's impossible! Never say never! They're what I've been following. Hope you to follow them too!

[Puppet]

So I watch American movies,.. they say it when they ask you to wait a bit. Like when you stuck in some place and you might need help for the way out. The emergency will ask you to 'hang on'.

or if you were in a car and the driver ask you to 'hang on' as he would speed up and take some sharp turns. Because if you 'hang on', you will never fall nor hit your head against anything.