Stimulants are drugs that speed up the signals passing throught the Central Nervous System (CNS). The CNS is the system that controls your feelings, such as contact with something.
Have you eaten any chocolate or drunk any soda lately? If you have, there's a good chance you gave your body a dose of a stimulant -- caffeine, which is also in coffee.Eating or drinking a large...
Ecstasy (MDMA) can act as a stimulant, hallucinogen, and entactogen.
Also common impurities in ecstasy pills like amphetamines definitely are stimulates.