怦怦
thumping sound (onom.); to be eager and anxious (to do sth); faithful and upright
蓬蓬
luxuriant; abundant; (onom.) booming sound of wind
蓬蓬
overgrown; unkempt (of hair)
心怦怦跳
The heart thumps wildly. (idiom)
心砰砰跳
variant of 心怦怦跳[xin1 peng1 peng1 tiao4]