[f. BUMPER sb.1] a. trans. To fill (a drinking-vessel) to the brim. b. trans. To toast in a bumper. c. intr. (and with object it) to drink bumpers or toasts.

1

  Hence Bumpering vbl. sb. (attrib. in quot.).

2

1696.  W. Mountague, Delights Holland, 40. They [the Dutch] Bumper it but seldom.

3

1789.  Burns, Whistle, viii. I’ll … bumper his horn with him twenty times o’er.

4

1795.  Wolcott (P. Pindar), Hair Powd., Wks. 1812, III. 301. Ye bumper it in England’s cause.

5

1808.  Cumbrian Ballads, No. 75. 175. Come, bumper the Cummerlan lasses.

6

1859.  M. Scott, Tom Cringle, xviii. 510. We all sang and bumpered away.

7