An ugly female, or woman who is obese, or has unattractive features or an unpleasant odour. Has other meanings as well.
Many college initiations, or hazing, involves pledges seeking out an ugly person, to bring to a fraternity party, and the one who brings the ugliest person, wins.
Usually a rather cruel trick, where the 'date' is humiliated in public, or made fun of.
They are generally lured without knowing that it is a cruel joke, to make fun of their features.
Can refer to Cocaine, in a street usage.
Most notably used by dealers, as a form of code, similar to 'snow' or 'skiing'.
Also can be in reference to a woman, who is easy or more likely a Prostitute.
To be a talker, one who is constantly talking. Yak or Yakker.