Breaking bread means sharing what they’ve got (see previous lines) and pinching a loaf is taking a dump. He’s on top of the game and still shitting.

Tower Records used to be a chain of music stores.
But, thanks to the technological advances and the Internet, it had to shut down in 2006, probably due to to poor business (kinda like Blockbuster).

Not only is he going to kill you, but he’s going to come to your funeral service while it’s going on and strangle your dead corpse just to make sure he finished the job.

This is a reused line, it was orginally on 12 Minute Freestyle

The rap game chewed him up and spitted him out, but he’s back now. Remember the lines of “Lose Yourself”: “I’ve been chewed up and spit out and booed off stage”

Eminem also pronounces “him” like “Em” which is a shorter way to say Eminem’s name. This refers to the line above where Em says that he “used to be called M&M but he threw away the candy and ate the rapper”. He ate and chewed the M&M persona up and spit the Eminem persona out, which is who he is now.

Em suggests that the aforementioned feminists really love someone like him, who gives them an excuse to get indignant over his antics but is also attractive to them. This is in keeping with the song’s message that the way artists and media are judged is essentially hypocritical, and entertainment values always trump moral conviction in our culture in the end.

In “White America” he raps:

But Shady’s cute, Shady knew Shady’s dimples would help
Make ladies swoon, baby (ooh, baby!) — look at my sales!

The you-know-what he’s grabbing refers to his habit of grabbing his testicles during performances, while “flip someone the bird” is an idiomatic expression which means giving the middle finger, another Eminem signature.

Sylvia Rhone is the current President of Universal Motown Records.

Mentioning DVDs and mistakes in the same line may refer to her sex scene scandal.

This is a nice example of zeugma – she made physical DVDs and also made, more intangibly, a few mistakes when she was younger.

The Jheri curl is a permed hairstyle popular during the 1970s and 80s. Invented by the hairdresser Jheri Redding, the Jheri curl gave the wearer a glossy, loosely curled look. Even Michael Jackson sported that.

Nicki already compared Kim to Raggedy Ann in Roman’s Revenge
This is also a play off the first line of Drake’s verse on “Forever”:

Last name “Ever”, first name “Greatest”