a term being spread on the internet to describe the 47 senators who signed a letter to Iran apparently intended to undermine the president's efforts at diplomacy
The president is trying to negotiate a deal with Iran to prevent them from getting nuclear weapons, but the letter from the 47 traitors makes America look weak, putting any deal in jeopardy.
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).