steam up

US /stiːm ʌp/

UK /stiːm ʌp/

1.

to cover with condensed water vapor, making it difficult to see through

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The bathroom mirror always steams up after a hot shower.

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The car windows started to steam up in the cold weather.

:

fog up mist up

2.

to become angry or agitated

:

•

He started to steam up when he heard the bad news.

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Don't let him steam up, just try to calm him down.

:

get angry get mad become enraged lose one's temper

:

steam steam engine steam cleaner run out of steam on the up and up up up to