[f. TUN sb. + -FUL 2.] As much as fills a tun.

1

1562.  Turner, Baths, 4. Manye … carye great tunnfulls of it awaye, and drinke it in theyr houses.

2

a. 1592.  Greene, Vision, Wks. (Grosart), XII. 203. But for euery dram of mirth, they leaue behinde … a Tunfull of infecting mischiefs.

3

1819.  Shelley, Cyclops, 197. You may drink a tunful if you will.

4