The term 'Saber Cousins' refers to two fencing weapons, the saber and the epee. The saber is a curved sword with a single-edged blade, while the epee is a straight sword with a triangular cross-section. Both weapons are used in fencing competitions, but the saber is used for slashing attacks while the epee is used for thrusting attacks. The term 'Saber Cousins' is used to describe the two weapons because they are both used in fencing and have similar characteristics.