To feel jealous (usually in a romantic or attention-related context); to get jealous.
彼は少しヤキモチ焼くところがあるから、友だちと長電話すると拗ねる。
He's a bit jealous, so he sulks when I talk on the phone with friends for a long time.
妹が他の男性と話すと、すぐにやきもちを焼く。
My younger sister immediately gets jealous when she talks with other men.
やきもち焼くなんて、可愛いと思う人もいるよ。
Some people think it's cute to get jealous.
彼女はヤキモチ焼くタイプだから、たまには優しくフォローしてあげて。
She's the jealous type, so be kind and reassure her sometimes.