Used informally to describe someone who flatters others.
El lambona siempre busca la aprobación de sus superiores, lo que le causa problemas con sus compañeros.
The suck-up always seeks the approval of his superiors, which causes him problems with his peers.
El lambona siempre busca agradar a los profesores para conseguir mejores calificaciones.
The suck-up always tries to please the teachers to get better grades.