Waifus? In AALit? what

So a while back I remember Lauren's poetry discussion, where she discussed JPEGMAFIA's song "Grimy Waifu", and we had a really good discussion about it, and I especially remember the part where we were discussing these lines:
 
Uh, these bullets coming at you
Take these bullets for me, that's my grimy waifu (Hot)
They keep on dumping the tool
Take these bullets from me, that's my, ooh (Woah, huh)

I remember reading this at home and asking myself "what the heck?" and it seems like other people had that reaction too. We all kinda know what a waifu is, and it seemed really weird that it was being described as "grimy" and being told to take bullets for From him. After the class ended I was still thinking about these lyrics, and now I think it makes a bit more sense.

So, Nico, I haven't been on social media ever and have no idea what a waifu is.

Ok. So a waifu is basically a fictional female character (usually from an anime) which someone feels a connection to which someone feels really really, really, attracted to. The word itself, wife, is an English loanword to the Japanese language that began appearing in the late 1980s. The pronunciation changed, and now its being reintroduced to English in its altered form, waifu. It still means the same thing though, but now its associated to fictional characters.

But liking a fictional 2D girl is weird. How does this happen? Why do people have waifus?

Yeah its weird. It baffles me how people can actually be ok with this. However, actually crushing on fictional characters isn't impossible. 
Yeah, I didn't know either.
So it turns out that actual research has been done on stuff like this. One experiment done to compare the  interpretation  of  emotional  body  language displayed by animated characters compared to that of real actors showed that the animated body language could be accurately interpreted. From the emotions correctly interpreted, more were of sadder emotions than of happier, livelier ones. Basically- the humans could identify sadness in the animated characters better than they could happiness. idk. It is also totally possible to develop feelings for a being you made up. The human brain is... weird.
So if you're a sad person who is horrible at social interactions, ig you could see the appeal or actually manage to connect to characters who show wide ranges of emotions. that character becomes the waifu. The waifu then becomes an escape from reality of sorts.
Its strange, I know.
I guess as long as people don't take it to the extremes, its fine. Some people keep on going through life because of their waifus, and I don't think its right to shit on people for it. Ig we have to understand some people really have trouble interacting with actual people. At this point however, its become more of a meme, and people use it more for fun than because they've actually somehow crushed on a cartoon character

So what the heck does this have to do with my interpretation of these lines?
I think we all agreed that by 'waifu' he meant gun. In the past, the army framed your gun as your girl. You bring it everywhere, its with you always; while eating, while on duty, while in bed, everywhere. In thise sense you'd be creating a sort of connection to it- it's your lifeline on the front lines right? Thats a pretty deep bond. By giving it a gender from the start, the gun could become a type of waifu, if the term is used loosely.
The 'grimy' part is one that confused me more. A "waifu", given that it means wife, isnt something someone would (or should, at least) call grimy. However, given that it is a gun that has seen duty (possibly) I guess it makes sense. In the end, this section is about the bond formed between a man and his gun.