TNT is a slur used to describe Filipinos in a derogatory way. "Tago Nang Tago" It's a filipino thats an illegal alien. Translates to "hides and hides" (from the I.N.S.)
The word TNT is a racial slur that has been used historically to degrade and dehumanize filipinos. The word is still used by some people for this purpose, and it is seen as offensive and hurtful to filipinos. If you are unsure about whether or not it is appropriate to use the word TNT, it is best to err on the side of caution and avoid using it in any situation.