and so on; and so forth; et cetera
An emphatic or playful extension of うんぬん (and so on), often used in casual speech or writing to trail off a list. It can carry a slightly dismissive or vague tone.
See also: 云々 (うんぬん)
He's going on about how busy work is, how low the pay is, and so on and so forth.
Regarding the new rules, it's nothing but complaints about the procedures being a hassle and so on.
Alternate kanji form; even less common than 云々かんぬん.
Reduplicative extension of うんぬん (云々), itself from Chinese 云云 (yúnyún), meaning 'and so on'. The addition of かんぬん creates a rhyming, emphatic phrase.