steam up

Verb

 * 1)  To become steamy.
 * 2)  To become coated with condensation.
 * The bathroom mirror steamed up when he opened the shower door.
 * 1)   To bring (a steam boiler) up to working steam pressure: to build up a head of steam inside (a boiler).
 * 2)   to build up a head of steam.
 * 3)  To cook by steaming.
 * I'll steam up a bunch of dumplings.
 * 1)  To cook by steaming.
 * I'll steam up a bunch of dumplings.
 * 1)  To cook by steaming.
 * I'll steam up a bunch of dumplings.