"that part right there" is California talk for when we agree with something someone said.
It doesn't always make sense to what someone said, unless one looks at it as "agreeing."
Also can be shortened to use as "that part"
You: "This beat has so much swag!"
Me: "That part right there."
You: "I'll never go back there again."
Me: "That part."
"The northern parts" is another name for the UK, because when you a somebody from there where they live, they'll respond, "I live in the northern parts". There is also the "southern parts".
Guy1: Yo crine, where are you from?
Guy2: I think he's from the the northern parts.
Crine: How did you know Guy2?
A males dick and or cock/penis
I saw his king parts last night
Yesterday I went to the doctor to get my king parts checked out