柠檬不萌谁萌咖啡不飞谁飞
[níng méng bù méng shéi méng kā fēi bù fēi shéi fēi]
It loosely interprets to ‘If lemon is not cute who is? If coffee does not make one soar/fly/high who can do that?' - It playfully contrasts different things with unexpected adjectives and effects using rhyme. It seems playful and nonsensical, possibly referring to preferences for caffeine or citrus flavors but likely mainly chosen for its rhythmic sound value.