Sentence:  "many's de time w'at I sees um laughin' en laughin', w'en I lay dey ain't kin tell w'at dey er laughin' at deyse'f. En 'tain't der laughin' w'at pesters me, nudder" — relenting a little — "hit's dish yer ev'lastin' <WSD>snickle</WSD> en giggle, giggle en <WSD>snickle</WSD>." 
Meaning of the word marked with <WSD> tags:  (dialect) To laugh at someone or something