[chunk] n [perh. alter. of chuck short piece of wood] (1691) 1: a short thick piece or lump (as of wood or coal)
2: a large noteworthy quantity "bet a sizable ~ of money on the race"
3: a strong thickset horse usu. smaller than a draft horse
[2]chunk vi [imit.] (1890): to make a dull plunging or explosive sound "the rhythmic ~ing of thrown quoits --John Updike"