"flumping" in the verb sense
1. flump, flump down
2. plank, flump, plonk, plop, plunk, plump down, plunk down, plump
set (something or oneself) down with or as if with a noise
"He planked the money on the table"
"He planked himself into the sofa"
Source: WordNet® (An amazing lexical database of English)
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