belch out
To expel, often violently. You can't see far into the distance with all of the smoke being belched out by the factories along the river.
belch up
To expel in an upward direction. You can't see far into the distance with all of the smoke being belched up from the factories along the river.
belch out
to burst, billow, or gush out. Smoke belched out of the chimney.
belch something up
to cause the release of something that goes upward. The fire belched flames and smoke up. The volcano belched up clouds of poison gasses.
belch
(bɛltʃ) n. beer, especially bad beer. Pass the belch. Anything’s good on a hot day.