A sort of contraction of 'and then'. Commonly used by my 6 year old son. Generally in an excited description of the latest near catastrophe.
Something is now
broken, for which he
totally disavows any direct connection... Although he saw the whole event occur.
"Son, how'd the lamp in the rec room get broken ?'"
"
Daddy.... well. I was just playin' ... you know.... ridin' my bike ??? An'den that stupid lamp just falled over. I saw it! It
busted ! It scared me!"
And then we sat down and had a heart to
heart talk.