"girlprince" means any female or transfem character who has a prince/knightly persona.
Person A: Haruhi Fujioka from Ouran high School host club is totally a girlprince!
Person B: Ikr?? And so is Haruka Tenoh and Benio Amakusa
Mainly used to describe liars and fake people such as:
Amberlynn Reid, Jimin from AOA, Kim Woojin probably, Zoe Laverne and Nessa Barrett
Madison: did you see that girl there?
Jake: Yeah, shes a lying ass bitch. What a Pinnochio