Definition of hypos:
(n) :
(slang) A hypochondriac.
(n) :
(slang) A hypoglycaemia attack in a person with diabetes.
(n) :
(slang) A hypodermic syringe or injection.
(n) :
(photography, informal) Sodium thiosulfate (also called hyposulfite of soda), a photographic fixing agent.
(n) :
(slang, finance, British) Hypothecation.
(n) :
(informal, law) A hypothetical case.