2013, Lauren Cordelle, "#Selfie: 2013", Liverpool Life (Liverpool John Moores University), 19 November 2013, page 8:
As well as the selfie, other picture crazes include the 'belfie' – a self-portrait of your bottom, the 'helfie' – a picture of one's hair, and the 'welfie' – a workout selfie.
2014, Anna Walker, "Me, My Selfie and I", Concrete (University of East Anglia), Issue 291, 14 January 2014, page 11:
Along with the meteoric rise of the selfie has come the emergence of its extended family members, the legfie (leg selfie), the drelfie (drunk selfie) and of course, the belfie (bum selfie, thank Kim Kardashian for that one).
2014, Ciara Treacy, "#instagood - the rise of Instagram", Sin (National University of Ireland, Galway), Volume 15, Issue 8, 27 January 2014, page 21:
In the past month the belfies of a twenty year-old New Yorker Jen Selter have become a worldwide phenomenon through gym pictures she posted as 'fitspiration' to us all.
Millie's videos featuring an ever growing thigh-gap and Kim's impossibly proportioned 'belfies' make me feel extra guilty about my lunchtime mars slice.
It may soon be "power off" for Insta-sensations like Jen Slater (the Instagram star who made the "belfie"–aka the butt selfie […]
2014, "Dear Dolly", Metro Herald, 23 July 2014, page D17:
Send him a belfie with the words 'kiss' and 'my' on each cheek, and good riddance to him.
2015, Jonathan Gabay, Brand Psychology: Consumer Perceptions, Corporate Reputations, Kogan Page Limited (2015), →ISBN, page 234, published 3 March 2015:
The selfie aid that best reflected the mindset of narcissistic consumers was the Belfie Stick. It facilitated taking a picture of a user's own backside.
According to Vogue, we're in the era of the big booty and the number of people posting belfies (selfies of butts) seems to have proven this right.
2015, Bernadette Morra, "Nicole Kidman Is The Master Of Red Carpet Poses" (editor's letter), Fashion, April 2015, page 26:
And Wendy Schmid explores the butt lifts, glute strengtheners and bum facials that have made a belfie-worthy bottom Beverly Hills's newest obsession ("Bottoms Up," page 96),
2015, Christmas Abbott (with Maggie Greenwood-Robinson), The Badass Body Diet: The Breakthrough Diet and Workout for a Tight Booty, Sexy Abs, and Lean Legs, HarperCollins (2015), →ISBN, unnumbered page, published 12 May 2015:
Take several “before” pictures of your whole body and include a “belfie” (butt selfie) the day before you start the program. Do it from different angles — front, side, and back.
2015, Tonny Krijnen & Sofie Van Bauwel, Gender and Media: Representing, Producing, Consuming, Routledge (2015), →ISBN, unnumbered page, published 19 June 2015:
Not only by discussing it, but by embracing clothing devices such as the G-string, loving Christina Aguilera's song Dirrty (2002), posting sexy selfies and belfies on SNS sites and so on.