Ah, high school. Back when we'd sit in AP English class and listen to the teacher go on about the supposed symbolism in classic works of literature for what felt like hours. Lo and behold, it's entirely possible that some writers just want to write a damn sentence that doesn't contain some sort of brilliant imagery.
All the way back in 2013, a Tumblr user pointed out the line "What, you egg?" in Shakespeare's MacBeth. Was Shakespeare trying to convey some sort of secret meaning here? It's possible, but it's more likely he just wanted to throw in a silly insult.