An exceptional pair of breasts on a very attractive woman who has children.
"Wow, Joe. That lady down at Grand Mart has the most amazing mama titties I've ever seen!"
by geurillawarfare June 01, 2013
When a woman's breasts enlarge due to having a child.
"Damn, Scarlett johansson's got them mama titties now!"
by Nmclark May 15, 2015