dope

n. [ D. doop a dipping, fr. doopen to dip. Cf. Dip. ] 1. Any thick liquid or pasty preparation, as of opium for medicinal purposes, of grease for a lubricant, etc. [ Webster 1913 Suppl. ]

2. Any preparation, as of opium, used to stupefy or, in the case of a race horse, to stimulate. [ Slang or Cant ] [ Webster 1913 Suppl. ]

3. An absorbent material; esp., in high explosives, the sawdust, infusorial earth, mica, etc., mixed with nitroglycerin to make a damp powder (dynamite, etc.) less dangerous to transport, and ordinarily explosive only by suitable fulminating caps. [ Webster 1913 Suppl. ]

4. Information concerning the previous performances of race horses, or other facts concerning them which may be of assistance in judging of their chances of winning future races; similar information concerning other sports; by extension, any information not generally known, especially when coming from an inside source; as, the inside dope. [ Sporting Slang ] [ Webster 1913 Suppl. +PJC ]

5. an ignorant or stupid person. [ Colloq. ] [ PJC ]

get the dope on learn the true story; get the inside information.