Liar Liar pants on fire  
by silvermoon.

You will need: 
*Underwear of the lying person (if not buy a pair and write the name of the offending person in the crotch 
of the underwear with a black
marker.
*A bottle of the hottest Tabasco sauce you can find
*A bit of thistles and nettles, and cinquefoil (to urge them to tell the truth) 
*Black pepper 
*Rubbing alcohol 
*A lighter or matches
*An old cauldron or an outside grill

What to do: Pour the Tabasco sauce on the crotch of the underwear. Let
   it dry. Sprinkle the herbs and black pepper. Sprinkle with a bit of
   alcohol(just a tad) Use the lighter or matches(better to have a long
   match) Burn in an old cauldron or outside grill. ( you can improvise,
   such as an old pot you don't use) As the underwear burns say:

(The person's name) I've had enough
   I rise above you, I've gotten tough
   The wagging tongues of the flame bite back
   I refuse to take this hateful flack
   Your lies are a conflagration
   Bringing you to degradation
   Your deceit recedes it's clinging grasp
   And I am free, the truth at last.

Scatter the ashes off your property, better to bring it to a field or
cemetary.

~i did not write this, but i thought it was pretty funny.  i wonder if it works!~