v. dial. and U.S. [Imitative.] intr. To plunge.
1839. Marryat, Diary Amer., Ser. I. II. 232. Here are two real American words:Slopingfor slinking away; Splunging, like a porpoise.
1844. Carlyle, in Froude, Life (1884), I. 335. After a certain period of splunging and splashing.
1897. R. M. Johnston, Old Times Mid. Georgia, 68. I had no more idees of getting married again than I had of splunging head foremost into the very bottom o Rudisills mill-pond.