Also warriors are nobility and conans or barbarians are a lot more gruesome.

maybe white coroners discriminate ebony corpses.

Because “hop on that trolley” can also mean dying, Kendrick is talking about having the correct affiliation when you die so you go to Heaven. It subtly continues the religious references with “God” and “hell” just a few lines before, posing Heaven and Hell almost like rival gangs or territories.

IV is the Roman numeral for “four,” a number which Lamar references heavily in the song, usually paired with “nine” (see: “back when I was nine/Joey packed a nine.”

(19)94 was a pivotal year for Lamar, and is the subject matter of this song.

i dont think this is a refrence to drugs.

Coincidentally, this line, stating “IV’s on top of IV’s” has 4 different meanings.

the “AKs, ARs, aye y'all…” thing has been done before in rap for example on royce’s mistah fab diss

Royce Da 5'9" - Who Got Bodied?! (Mistah F.A.B. Diss) — Genius

Who Got Bodied?! (Mistah F.A.B. Diss) Lyrics: (Royce da 5'9") / Now I done told this nigga to shut his mouth / I guess he wasn't hearin' me / I'm beyond this peon, he's scared of me / Apparently he don't see that he don't

not sure where that line originally comes from but kendrick probably pays homage to something with it, maybe somebody knows?

There is a possible mention to drill musician Chief Keef most known for the hot song “don’t like”- circa 2012 and for the popularisation of the drill music genre in which the main topics/themes are about exploitation, drug dealing and violence.

Kendrick says “not a rap on how a sling crack or move cocaine” and later goes on the say “not that drill sergeant” repeating the previous message we heard in the first line of this passage where he details how is story is not of someone who raps about drug dealing.

Chief keefs name and role in the Rap closely resemble that of a Drill Sargent.
I think the connection can be made in tangent with the other double entendres between these lines, as chief keef was not an obscure feature at the time as he was quickly rising to fane and facing controversy for his subject matter.

Kendrick has also spoken in a 2012 interview with pitchfork about Cheif Keef and his representation in Hip-Hop . Seen in this piece by VladTV.

LINK:

Kendrick Lamar Says He Understands Chief Keef — Vladtv

In the Complex "Quote of the Day", Kendrick Lamar spoke to Pitchfork about his feelings towards Chief Keef. He briefly commented on the situation Keef had with Lupe Fiasco, in which Lupe said he was "scared of the violence Chief Keef represents."

“A new notch in your belt” could refer to her relationship with John Mayer, who is known as a “player”

I think a notched belt means he is keeping track of every girl/woman he has been with. Men keep track with woman they dated or had sex with so they don’t care about there feelings. He will always be a player and will move on really fast from woman to woman.

Yes, a notch implies a tally mark or a small scratch on a surface. She is saying that to this guy, she is only worth a little line.

A notched belt isn’t a list. A list indicates that he cared enough to write down their names. A notched belt means that he only keeps track of how many he’s had. Men like that don’t count every woman they date; they count the ones they have sex with.

It’s a reference to “Sugar We’re Going Down” by Fall Out Boy. Taylor used to love this song and has stated before that it’s the only thing that got her through middle school.