I. adjective
Etymology: slipslop
1. archaic : given to or marked by verbal blundering
2. : lacking in solidity or content : inane , wishy-washy
talked slip-slop commonplaces with them; they spoke of the country and the weather, and he of the city — Samuel Lover
II. intransitive verb
Etymology: imitative
: to move about in loose slippers or to make the flapping sound produced by or as if by such movement
laid him in a crib and slip-slopped down to serve dinner — Anne Green
his untidily shod feet slip-slopping on the wooden floor — Rafael Sabatini