drop back, trail, sound, force down, glug, choke down, drift, meander, gulp, crawl, ease, down, gorge, dawdle, drink to, guzzle, creep, go, fall behind.
It startled Chug
a little, so that he held the girl off the better to look at her.
The train, which had been running more slowly, drew up with a chug,
and some minutes passed before it again gathered itself and lurched on.
The motor boat was now ready to set forth again, and soon it was chug-
chugging out of the quiet bay.