Comparative form of quirky: more quirky(adjective)
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Use "quirkier" in a sentence
"These 10 movies show that Pitt is a dangerous scene-stealing co-star, especially in quirkier material."
"Although there's been progress in recent years, the Netflix "Watch Instantly" catalogue can at best be called quirkier than its far-wider DVD selection."
"Some people will watch anything in which Johnny Depp is associated, and the quirkier the character the better."