Maureen E. Gaffney (born November 5, 1958, in San Diego, California) is an American actress and activist.^[1]

Gaffney hosted two of her own television talk shows: Women Aloud! (which was shown on the Comedy Central network) and The Mo Show.^[2]

She and friend Kathy Najimy wrote and starred in two Off-Broadway shows, The Kathy and Mo Show: Parallel Lives (1989)^[3] and The Kathy and Mo Show: The Dark Side,^[4] both of which won Obie Awards.

She appeared in Seasons 4 and 5 of That '70s Show as Joanne Stupak, Bob Pinciotti's girlfriend, had a recurring role in Mad About You and guest starred in Friends and Veronica's Closet. In addition, she appeared in the black comedy about beauty pageants, Drop Dead Gorgeous.

Gaffney appeared on the British television talk show The Full Wax starring Ruby Wax, in which she portrayed American correspondent "Taffy Turner", in the recurring segment "Taffy Turner: Inside America". Gaffney teamed up with Jennifer Saunders in a recurring role as Bo in the sitcom Absolutely Fabulous; in 2004, talks of a spin-off show began but nothing surfaced. She is co-host of the "Women Aloud" radio program on Greenstone Media.

Gaffney is an activist for same-sex marriage and has officiated at same-sex marriages as a certified marriage celebrant.^[5]