As/Is·Posted on Oct 16, 2015This 103-Year-Old Woman Dressed Up As Wonder Woman For Her Birthday And It's PerfectMary Cotter is truly a badass.by Julie GersteinBuzzFeed StaffFacebookPinterestTwitterMailLink What did you do for your last birthday? Tap to play or pause GIF Tap to play or pause GIF mysims.wikia.com Because Mary Cotter, of Montclair, Calif., spent hers volunteering at a senior center. In a Wonder Woman costume. And oh yeah, she's 103 YEARS OLD. abc7.com Mary's been a volunteer at the senior center for years. She lives alone and drives to the center to work and help out five days a week. abc7.com So yup, she's older than a lot of the people she helps out at the senior center. "They call me the barmaid because I'm serving drinks," she told KABC. Tap to play or pause GIF Tap to play or pause GIF abc7.com How baller is Mary? She was on her high school's swim team in the 1930s, taught swimming in the '60s, and helped to rescue sea turtles into her '90s. Tap to play or pause GIF Tap to play or pause GIF "They call me the barmaid because I'm serving drinks," she told KABC. I did not get off the couch today. Whoops. The Wonder Woman costume was a gift to Mary from some of her friends, who felt it really represented her indomitable spirit. abc7.com As for her life secret? "Just keep busy I guess." abc7.com Sounds good to us. Check out Mary's whole amazing story here.