godan verb (-ru), intransitive verb
chat enthusiastically; chatter; talk on and on
Colloquial, often implies lively, non-stop talking. Similar to しゃべる but with a stronger sense of continuous, animated chatter.
彼女は電話でずっとしゃべくっている。
She's been chatting away on the phone the whole time.
I like to chatter with friends at a café.