To swap an engine from a car with an engine that doesn't belong in it.
I'm gonna cross-breed my BMW to a 2JZ Toyota Supra engine.

I cross-bred my BMW with a EJ25 Subaru engine. Which is also called a FAIL
by SubieDoobyDo May 03, 2010
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{Cross-bred-past tense}
To go out/date someone from another school. Commonly used in same sex schools as a majority of the people there are not homosexuals.Also used in co-ed schools.
Linda has cross-bred with that blond guy from the private school.
Or
Are you going to cross-breed with that guy from St Xaviers.
by End Of Fashion January 17, 2006
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This is usauly a dog thing. This is wear a dog is a mix between two different breeds. Some times mixed breeds are classed as different breed and are called designer dogs i.e. a cross between a cocker spaniels and a poodle is a cocker poo, a cross between a labrodor and a poodle is a labrodoole

However not all cross breeds are designer dog breeds. Some aren't even recognised as a breed but are recognised as a 'type' of dog these types include the lurcher wich is a cross between a greyhound and another sight hound
I have a border collie cross witha cockier spaniel, he completely mental cross breed.
by Finnerty October 24, 2009
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A Wes!!!!
Someone that is a cross between their mother and father????
by phill March 14, 2004
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