I think he means that the person is going to stuff as much food into his stomach as he possibly can. (aka he is getting fat)
The line "I enforce thy rotten jaws to open, and in despite I'll cram thee with more food" is spoken by the character Romeo in Act 5, Scene 1 of Shakespeare's "Romeo and Juliet." He says this as he confronts the tomb of Juliet, believing she is dead, and he intends to join her in death. This moment reflects his desperation and determination to be with Juliet, even in the face of death.
Personification is a literary device in which an inanimate object is described as if it were alive, and especially as if it were human. Like all literary devices, this enables us to get a clearer idea of the thing being described. When Romeo says, "Thus I enforce thy rotten jaws to open and in despite I'll cram thee with more food" he is talking about his difficulty in opening the tomb and his intent to join Juliet in death. He imagines the tomb as an animate being which is keeping its teeth clenched even though someone is trying to feed it. Its teeth are the doors which Romeo is trying to pry open and the food is Romeo himself who proposes to become food for the tomb by dying and being buried in it.
Wherefore means why. "Wherefore art thou Romeo?" means "Why are you Romeo?" Juliet is asking why he is Romeo, or more simply why does he have to be a member of the Montague family.
The Ohio-class Trident submarines are 42' at the beam. That doesn't mean there's more room for crew - it just means there's room to cram more equipment into.
romeo
Romeo and Juliet is the more popular.
Romeo
For never was a story of more woe Than this of Juliet and her Romeo.
"Now is the sun upon the highmost hill of this day's journey."
Romeo says: "Thou detestable maw, thou womb of death, Gorged with the dearest morsel of the earth, Thus I enforce thy rotten jaws to open, And, in despite, I'll cram thee with more food!" He describes the tomb as a "maw", or mouth, which has jaws and which is fed with dead bodies, including Juliet's body, the "dearest morsel of the earth". In a needless mixed metaphor, he also calls it a "womb".
Juku, often translated as "cram school" in English.
Romeo, in Act 1 scene 2. The full quotation is: Not mad, but bound more than a mad-man is; Shut up in prison, kept without my food, Whipp'd and tormented and-God-den, good fellow.