The Vietnamese word "bù xù" is an adjective that describes something that is messy, disheveled, or ruffled, particularly in relation to hair or fur. When you say someone has "tóc bù xù," it means their hair is untidy or unkempt, often sticking out in different directions.
While "bù xù" primarily refers to untidiness, it can also convey a sense of endearment or cuteness when referring to pets or children. For example, a child with messy hair might look cute rather than just disheveled.