belch up

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.
See also: belch, up
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

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.
See also: belch, up
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
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References in periodicals archive ?
The low pressure allowed hydrates to melt and belch up methane.