A sexual move performed by a man on a woman in which the scrotum (i.e. nut sack) is raked and in some cases smeared across the breasts (i.e. mammaries). The move may further include dipping the scrotum in the woman's mouth and/or a declaratory statement proclaiming that the woman is the recipient of a bag or sack of chestnuts.
I gave my girlfriend a bag of chestnuts last night and she was all about it.