Quote said multiple times by Kim Taehyung / V from BTS when the group is in America. Seems that he's really proud of his members and says this on a very fluffy and cute way.
"I'm proud of you" said Taehyung while looking at Namjoon, he giggled not believing what this dork is doing.
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).