If you want to self identify as "not grown up" that is your prerogative. ;)
Pet names for parts is fine on the forum - although it's really just a "I'm one of the cool kids" thing, that explains neither what the hose is, nor where it is located. In other words not particularly helpful, because you need to already know about the hose to know what is meant. The vast majority of parts sellers will look at you as if you are an idiot if you ask for "secret heater hose".

