塑料姐妹花

sù liào jiě mèi huā

(neologism, 2017) (slang) a pair of women whose seemingly close friendship is actually shallow, insincere and subtly competitive; fake besties; frenemies

to model (a figure) in clay

liào

material

jiě

older sister

mèi

younger sister

huā

variant of 花[hua1]