Refers to someone who has an excessive pride in their appearance or achievements.
Su actitud vanidoso lo alejó de sus amigos, quienes no soportaban su constante necesidad de admiración.
His vain attitude drove away his friends, who could not stand his constant need for admiration.
El vanidoso siempre habla de sus logros, sin importar lo que piensen los demás.
The vain person always talks about his achievements, regardless of what others think.