ふむふむ

ふむふむfumufumu

expression

  1. hmmm
  2. uh-huh
  3. murmur indicating approval, comprehension, etc.

Study it in Yanamino

Data from JMdict, KANJIDIC2 (EDRDG), KanjiVG, CC-CEDICT and Make Me a Hanzi. Sources and licences