
ETYMOLOGY
from clump or clumper (a lump, mass);
possibly on model of simpleton
EXAMPLE
“…Thus departinge from thence it chaunced him to stray asyde from his companie, and, fallinge into reasoninge and so to altercation with a stronge stubberne clomperton, he was shrowdlie beaten of him, yeat hee kepte him from beinge hurte of his menne, grauntinge that hee hadd well deserved those stripes…”
From: Polydore Vergil’s English History, c1534
from an early translation preserved among the mss. of the old royal library in the British museum