A cytokine produced by T helper cells that causes severe masturbative syndrome. Commonly written as IL-25, this chemical messenger causes large erections and explosive ejaculation. Most common in caucasian males between the ages of 13 and 25.
"F*ck off mum! I can't help it! I have an intense buildup of interleukin 25! CLOSE THE TOILET DOOR!"
The illness you get after a heavy session of kissing strangers in nightclubs. It may present swollen glands or sore throat.
Patient: 'Doctor my throat is sore and my neck is swollen, I think I have tonsillitis.'
Doctor: 'No you have a case of Club Kneck Neck. Have you considered attending the sexual health clinic for a check up?'