Final answer:
The idiom means 'be patient'
Step-by-step explanation:
The idiom 'Keep your socks on! I'm coming as fast as I can!' does not literally mean talking about socks. Instead, it is an idiom that is used to tell someone to be patient. When someone tells you to keep your socks on, they are asking you to wait patiently. Just like you would keep your socks on while waiting for someone to arrive.
Learn more about Meaning of idioms