Ed Sheeran is an English singer and producer.

People usually pronounce “Officer” as “Ocifer” when they are intoxicated, also his reference to “shots”(small amounts of extremely strong alcohol) backs up the theory.

“Oreo” is a term given to people of inter-racial parents. Example of the girl Cyhi is speaking of:

The Baltimore Orioles(baseball team) theme and team colours are also Orange and Black.

Reference to white American rapper Mac Miller.

Speak says he isn’t a “whiteboy” because his antics portrait something different.

Speak also refers to the fact that he is half-Mexican & Jewish

Reference to the Ebola Virus.

Willy Bobo refers to dld slang term for giving the latest news or gossip on recent events.

“Mardi Gras” refers to events of the Carnival celebrations, beginning on or after Epiphany and culminating on the day before Ash Wednesday. It is also one of the flashiest events ever, hence is usage of the word “Flashy”.
Frak Edit: Also girls flash their boobies

He is saying she is performing Oral sex but also makes reference to religions and how in some of them the followers of these religions “Kneel” to pray.

Only thing she is praying to is his penis.

Speak! is saying that the bars on his notebook are so crazy that he has to take Ritalin. The drug is mainly used to treat “attention-deficit hyperactivity disorder, postural orthostatic tachycardia syndrome and narcolepsy.”