foam up


Also found in: Dictionary.

foam up

To achieve a foamy, sudsy, or frothy consistency. The soap started to foam up once I mixed it with water.
See also: foam, up
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

foam up

[for something, such as soap or milk] to make foam or lather. Milk will foam up when it is boiled. The boiling soup foamed up and slopped over the pot.
See also: foam, up
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.

foam up

v.
To become more foamy: Shaving cream foams up when you spray it from the can.
See also: foam, up
The American Heritage® Dictionary of Phrasal Verbs. Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
See also: