Similar to MiG-15. It's an anti tank missile nicknamed "fagot", just like the MiG-15 is also nicknamed "fagot". A cryptic way for us military nerds to call someone a faggot without them knowing.
When you fail at something in life (eg. failing an exam or not getting a job), go home and spend an hour just standing in the shower, propping yourself up against the wall with your eyes on your feet.
Caleb knew the only thing to do after he didnt get prefect was take a failureshower.