double-cross

double cross

noun
1.
a betrayal or swindle of a colleague.
2.
an attempt to win a contest that one has agreed beforehand to lose. Compare cross ( def 21 ).
3.
Genetics. a cross in which both parents are first-generation hybrids from single crosses, thus involving four inbred lines.

Origin:
1825–35

Dictionary.com Unabridged

double-cross

[duhb-uhl-kraws, -kros]
verb (used with object) Informal.
to prove treacherous to; betray or swindle, as by a double cross.

Origin:
1900–05

double-crosser, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
double cross
 
n
a technique for producing hybrid stock, esp seed for cereal crops, by crossing the hybrids between two different pairs of inbred lines

double-cross
 
vb
1.  (tr) to cheat or betray
 
n
2.  the act or an instance of double-crossing; betrayal
 
'double-'crosser
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

double-cross
1834, from double + cross in the sense of "pre-arranged swindle or fix." Originally to win a race after promising to lose it.
Online Etymology Dictionary, © 2010 Douglas Harper
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