שִׁיתּוּף, (שָׁתַף) partnership, esp. (Sabbath law) shittuf, the formation of a fictitious partnership in an alley by depositing in it some article of food in which the inmates concerned have a share, which has the effect of allowing them to move things within the area enclosed by the alley. Erub. 71ᵇ בסומכין על ש׳ וכ׳ they differ as to whether shittuf can be relied upon to take the place of an ʿerub (עֵירוּב). Y. Sabb. XIX, beg. 16ᵈ קורה בלא ש׳ וכ׳ the placing of a beam over an alley without shittuf has the effect of allowing the carrying of objects on the Sabbath. Y. Erub. V, 23ᵈ bot.; a. fr.