The 18-year-old singer/songwriter took to Twitter to suggest he was packing an underwhelming package after the DJ posted a link to a fundraising account on the social media site asking for fans to donate money to raise enough funds to boost Taylor's butt.
She said: ''I feel like I'm going to get an angry text message now. Basically he had made some sort of joke kick-starter about getting Taylor Swift a booty and I said we should probably look at him getting that sorted out too.''
Lorde insists she is apologetic about her tiny todger tweet, and hopes Diplo - who has been romantically linked to Katy Perry - doesn't get too mad.
Speaking during a BBC Radio 1 interview, she added: ''I'm sorry, I love you!''
The 'Royals' singer has become friends with Taylor, 24, since they first met and credits the 'Shake It Off' hitmaker for her new obsession with craft hobbies.
Lorde also describes her pop peer as her role model in the music business.
She revealed: ''I'm super into crafts now, which I think she is guilty for! ''Stuff like sewing and paper-doll books! When I was on my US tour I was cutting out paper dolls thinking, 'What has come over me?' But she is very inspiring in the way she conducts herself and how she runs her business. We are both quite young 'girl bosses' and it's an unusual position that we are both in, it's cool to have someone who's in the same position that I'm in and to have her to look up to. She is so together.''