As a verb "tump" and "tump over" are onamonapidic. Southern US usage would never say, as one online dictionary uses as example, "tump over a glass of beer." Beer glasses do not make a "tump" sound. A bucket of nails might tump over, a cardboard box of clothing might tump over, but a telephone pole, a beer glass and a piece of sheet-metal would never be able to tump over.
Also, as a southerner, I believe that anything which tumps over does so from a short distance-- as in only short items tump. —This comment was unsigned.
- Thanks. We will have to check out usage. MWOnline says the origin is not onomatapoeia, but possible UK dialect tumpoke. DCDuring TALK 19:15, 8 April 2010 (UTC)
It is felt by Professor Skeat that the Welsh TWMP is borrowed from English; but the term could have been carried through (in a limited and, perhaps, provincial manner in speech only) from Celtic, so that Welsh TWM is cognate with TUMP. 126.96.36.199 10:29, 25 February 2016 (UTC)Andrew