JMdict: 1011580

ペラペラ

1. [adv,adv-to,adj-na] fluently (speaking a foreign language)
2. [adv,adv-to] incessantly (speaking); glibly; garrulously; volubly
3. [adv,adv-to] one after the other (flipping through pages)
4. [adj-no,adj-na,adv,vs] thin (paper, cloth, etc.); flimsy; weak

Words often seen with this one: (experimental feature)

こと (15), 英語 (14), 先生 (10)