What one does after a long day at a dance competition. When sitting down for dinner one does not want their thong up their butt, so they politely remove themselves from the table by saying they must go "de-thong". An action for the sake of comfort and relief.
"My oh my I am tired from that full day of dancing, and this dinner looks delicious, but I really must go de-thong - excuse me for just one moment."
by MT31 November 20, 2013
to pick your underwear out of your ass
Jennifer had a massive wedgie after slouching on the couch, so she reached back and de-thonged herself.
by dinglebutt December 15, 2011