what is the meaning of these words easy money , good money , showtime
hi there
I have been watching the street workout in youtube channel for a while and the guys in them use these words all the time for motivation (easy money, good money, showtime) but I don't understand the exact meaning.
these guys are from Brooklyn in new york.
I appreciate your assistance.

Question

what is the meaning of these words easy money , good money , showtime
hi there 
I have been watching the street workout in youtube channel for a while and the guys in them use these words all the time for motivation (easy money, good money, showtime) but I don't understand the exact meaning.
these guys are from Brooklyn in new york.
I appreciate your assistance.

Answer

Easy money is slang for something that has a big payback. 
Good money- not sure. Do you have a full sentence?
Showtime - slang for things are going to start happening now

Answer

In the context of a physical exercise workout:
Easy money means easily done.
Good money means you get good results.
Showtime means let’s get this done.