A phrase originating from the minorities in southeast San Diego. It is usually used as an expression to brag, or to excite. In a broad sense, it is synonymous with the phrase "fuck yeah."
It is usually pronounced "LEZGO" or "LESSGO"
I'm about to ace that test! LET'S GO.
We're about to win that shit; LEZGO!
Also "Let's go" is a phrase said when you are ready to go and do something. Can relate to doing your taxes or aquiring sexual intercourse from a lady friend (or male friend) Or if you are just going to do something stupid.