1. An illicit, habit-forming, or narcotic drug; especially; marijuana
2. A preparation given to a racehorse to help or hinder its performance
3. chiefly Southern; a cola drink
4. A stupid person

ETYM Dutch doop a dipping, from doopen to dip. Related to Dip.
Slang terms for inside information; SYN. poop, skinny, low-down.
1. A thick liquid or pasty preparation.
2. A preparation for giving a desired quality to a substance or surface.
3. Absorbent or adsorbent material used in various manufacturing processes (as the making of dynamite).

1. To add impurities to (a semiconductor) in order to produce or modify its properties; in electronics.
2. To give a narcotic to; SYN. dope up.
3. To take dope.