Bianca (Mae Whitman) is enjoying her senior year of high school with two close friends Jess (Skyler Samuels) and Casey (Bianca A. Santos) both of who are significantly more popular than she is. She is also the neighbor and former childhood friend of Wesley Rush (Robbie Amell), a star on the school's football team, with whom she had fallen out with during high school.
The DUFF (1/10) The Hottest Friends
https://youtu.be/sHt3TElCugg
The DUFF (2/10) What Homecoming Means to Me
https://youtu.be/qwUgyrgP9H4
The party turns out to be a disaster for her, as it's there that Wesley unthinkingly reveals to her that she is the DUFF of her friend group, the Designated Ugly Fat Friend. The DUFF does not actually have to be ugly or fat, he explains, it's just the person in a social group who is less popular and more accessible than the others in the group. People exploit The DUFF to get to the popular people.
The DUFF (3/10) The Duff
https://youtu.be/-o-C21COWIQ
Bianca is insulted and devastated, but she soon realizes that Wesley is right. The students in her high school are only interested in her as a way to get to Jess and Casey. She takes her anger out on Jess and Casey and 'unfriends' them on social media and in person.
The DUFF (4/10) Unfriended
https://youtu.be/eXVVSJUhDmo
Desperate to change her social standing, and go on a date with Toby, she strikes a deal with Wesley, where she will help him pass science if he'll advise her on how to stop being a DUFF. They have a fun time at a mall, and attempting a makeover by buying new clothes. This backfires when Madison's toady records Bianca playing around in her new clothes and pretending that a mannequin is Toby.
The DUFF (5/10) Its Go Time
https://youtu.be/FK7N96w_3FU
They create a video ridiculing Bianca and post it online leading to the entire school mocking her. It also becomes clear that Madison, a reality-TV wannabe, feels possessive of Wesley, her on again off again boyfriend and is jealous of Bianca's relationship with him.
The DUFF (6/10) Bianca Goes Viral
https://youtu.be/MIpPd7IhPNA
The DUFF (7/10) The Date Game Plan
https://youtu.be/lKwghMLo0AY
At Bianca and Toby's date at his house, she finds herself thinking about Wesley, but tries to brush it off.
The DUFF (8/10) Pull it Together
https://youtu.be/NVCvHb1UK_g
The DUFF (9/10) Labels are Meaningless
https://youtu.be/4YFz0PJernc
Madison is crowned homecoming queen and Wesley is crowned king but he rejects Madison and the title and kisses Bianca in front of the whole school.
The DUFF (10/10) Getting The Girl
https://youtu.be/Rz0JV0WUjPo
https://en.m.wikipedia.org/wiki/The_Duff
http://www.the-numbers.com/movie/DUFF-The#tab=summary
