mash up

phrasal verb·1 sense·particle up

Meanings

1

Crush food into a soft mass

Why “up”? Something normal is disturbed. Feelings, systems, machines, or behavior become noisy, troubled, or out of control.

Mash up the bananas for the bread.
Crush the bananas into a soft mass for the bread.
He mashed up the potatoes for dinner.
He crushed the potatoes into a soft mass for dinner.

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