He sat down, smiled, and surprised the group by plopping two packs of Winston Reds on the table and lighting a cigarette.
Quite a good lot of bullets were plopping into the water, so the Commodore ordered the Colne to lie further out.
The old crone puffed up again at this unexpected flare, and went out of the room, plopping her feet on floor and mumbling.
This is boiling and plopping (I coin this word) like mush in huge pots, or thick soap in mighty caldrons.
1821, imitative of the sound of a smooth object dropping into water. Related: Plopped; plopping. Thackary (mid-19c.) used plap (v.). As a noun from 1833.