fat up
C1 informal separable both
In simple words
To get fatter or make something bigger. Not a standard expression — most people say 'fatten up.'
Literal meaning: To make fat — transparent and literal.
Meanings
1 C1 informal
To gain weight or cause something to become larger or heavier.
"The bears fat up on berries and fish before hibernation begins."
Grammar: separable
2 C1 informal
(Cooking, informal) To add fat or richness to a dish to improve its flavour or texture.
"Fat up the sauce with a spoonful of butter just before serving."
Grammar: separable
Usage notes
Non-standard and uncommon. Heard occasionally in regional or dialectal speech. ESL learners should use 'fatten up' instead. May also appear in cooking contexts meaning to add fat or richness to a dish.
Commonly used with
dish sauce livestock recipe winter
Forms
Base
fat up
I/you/we/they
3rd person
fats up
he/she/it
Past simple
fated up
yesterday
Past participle
fated up
have + pp
-ing form
fating up
continuous
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Synonyms
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