The Collaborative International Dictionary of English v.0.48:

lowdown \low"down`\, low-down \low"-down`\n.
   true confidential information.

   Syn: details, dope, poop, inside dope, inside information.
        [WordNet 1.5] lowdown

The Collaborative International Dictionary of English v.0.48:

lowdown \low"down`\, low-down \low"-down`\a.
   of the most contemptible kind; contemptible; mean; base;
   vile; -- of people or the actions of people; as, a lowdown
   sneak thief.

   Syn: abject, base, despicable, low, lowdown, miserable, vile.
        [WordNet 1.5 + PJC]

   2. having the soulful feeling of early blues; -- of jazz.

   Syn: funky.
        [WordNet 1.5 +PJC]