[syn: stump, mix up]
The Collaborative International Dictionary of English v.0.48:
mix up \mix up\ n.
1. To confuse the identities of (two or more objects); to
mistake (one object for another); as, at the family
gathering he mixed up his two nieces, to their great
amusement.
[PJC]
2. To mix together; -- usually implying a mistake, whether
done intentionally or unintentionally; as, the mixed up
this year's receipts with last year's, and it took hours
to find the right ones.
[PJC]
WordNet (r) 3.0 (2006):
mix up
v 1: assemble without order or sense; "She jumbles the words
when she is supposed to write a sentence" [syn: jumble,
confuse, mix up]
2: cause to be perplexed or confounded; "This problem stumped
her" [syn: stump, mix up]