A party usually held within the confines of the trailer park where the country bumpkins place their beverage of choice (Natural Light or Keystone Light) in the bathtub on ice and engage in lewd behavior while watching nascar.
“Last night at the white trash trailer bash me and Cooter made a beer bong with a piece of PVC pipe, duck tape, and an old oil can in honor of Dale Earnhardt Jr.'s big win.”
WT (White Trash) is a slang term for white people who typically live in a trailer park. They engage in activity such as watching nascar while enjoying a piss warm keystone light.
W is the 23rd letter in the alphabet
T is the 20th letter in the alphabet
“Oh my, Cooter’s daughter Chastity is sucha 23-20! She woke up this mornin in the back of a pickup with condom hangin outta her ass and one eye glazed shut."