What does «hermanito» mean in Spanish?

Short for brother.

Examples of use in Spanish: "los hermanitos caminaban tomados de la mano".
Someone's younger brother.

Examples of use in Spanish: "mi hermanito aún no asiste a la escuela".
A person who is held in high esteem; a great friend.

♦ Used in: Colombia - Mexico

Examples of use in Spanish: "te quiero mucho hermanita".