You possibly have a cold.. It could suggest something else but a cold comes to mind first
You have a viral infection.
it means that you should see a doctor
I believe what is being referred to here as "flem" is really phlegm, or the thick mucus that comes from the mouth. Green phlegm can mean a sign of an infection such as a cold or flu, bronchitis, or some kind of allergic reaction. Usually any kind of colored phlegm can be a sign of an infection so it is advisable to visit a health center or doctor if one has persistent colored phlegm for prolonged periods of time.
Mean Mr. Mustard was created on 1969-09-26.
Someone may have given you a (tiny) tablet of methylene blue which has this effect - amusing but harmless.
Mustard has a sharp or keen taste. "Keen as mustard" means being sharp-minded.
mucus
Red mucus is just spotting before your period is about to start. There is normally mucus that plugs-up the opening to the cervix and around menstruation it can be carried out with menstrual flow, the blood is your menstrual flow.
mustard gas
If your nose is "running," then you have a mucus discharge. The image is of the mucus running out of your nose so that you need a tissue or you need to blow the mucus out.
In Art chiascuro is strong contrasts between light and dark. the word itself comes from the Renaissance for 'drawing on colored paper'.
Clear nasal mucus or, "snot", is usually associated with allergies. If your nasal mucus is green or yellow you may have an infection and should see a doctor.