old lady

noun Informal.

1. a mother, usually one’s own.
2. a wife.
3. a girlfriend or female lover, especially a female lover with whom one cohabits.

noun

1. an informal term for mother 1, wife (def. 1)
2. a large noctuid moth, Mormo maura, that has drab patterned wings originally thought to resemble an elderly Victorian lady’s shawl