It is the phrase "to be up to the cojones" without the spaces. See cojones ("testicles").
John Rene Plaut
BEHASTALOSCOJONES to be up to the toes, to be pissed, to be tired, to be up to the head, TO BE UP TO THE COJONES, to have the balls swollen Some synonyms, words or similar expressions may be up to the tusa, to be bored, to be desperate, to be tired
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