"You're talking through your hat, flopper," he said shortly.
"T'ank you, mum," mumbled the flopper, as the money dropped into his hat.
The flopper turned at the door and came back a few steps into the room.
He looked first at the money, then at the flopper—and a tinge of red dyed his cheek.
A porter from the rear car squirmed and wriggled his way down to the seat occupied by the flopper.
"Me mouth's waterin'," observed the flopper, licking his lips again.
They stopped, they moved again—as the flopper stopped and moved.
Thornton did not look at her—he was still gazing at the flopper, his brows knitted.
She folded the letter slowly and returned it to the flopper without comment.
Presently, the flopper came out of the front door and joined him.
c.1600, probably a variant of flap with a duller, heavier sound. Sense of "fall or drop heavily" is 1836, that of "collapse, fail" is 1919; though the figurative noun sense of "a failure" is recorded from 1893. Related: Flopped; flopping.
1823, in the literal sense, from flop (v.). Figurative use by 1893.