The Adidas line of United merchandise is part of a record £750million deal that follows a 13-year relationship with Nike.
Twitter users from both sides of Manchester hit out at the design of the shirt following the high-profile midnight launch.
Manchester City fan Anna Kappa tweeted: "First @ManUtd can't be bothered to have an adult women's team & now the #sexist women's shirt!"
United supporter 'Helin' added: 'Seriously @Adidas?! why is the V neck so low compared with mens (sic) one? Some of us don't like to show cleavage."
Lucy Morris said it was "a disgrace. Women can't even wear normal looking football shirts these days? FML. Looks nothing like the men's."
Others said the shirt was not appropriate for football.
Lucy Varley, 20, said: "I'm not a football fan but my dad is an avid Manchester United fan and I sometimes go to matches with him.
"I'd never wear this though to a match, I would just feel weird going in revealing clothes, when I think about wearing it I wouldn't be able to relax - I wouldn't want to jump or cheer in it."
While there was no shortage of outrage, others liked the feminine twist in the design.
Andrea Ryder tweeted: "Personally, I really like the shape of the Man Utd women's shirt... #justmethen"
Sarah Penman added: 'Sexist? A woman's t-shirt has been made ... so surely that's a positive for the female supporters? As for plunging neckline!?
"The cut is slightly more feminine... not every female supporter wants to dress like a man. It's a choice. Frankly perhaps be grateful there is an option?!"
