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Meaning of cross up | Babel Free

Verb CEFR B2

Definitions

To double-cross or betray (someone).
Canada, US, informal
To let down, fail or disappoint (someone); to go back on a promise to (someone).
slang

CEFR level

B2

Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.

See also

cross wires cross write cross writing cross-appeal cross-appealed cross-appealing