Ruletean comes from the verb ruletear, which literally means "to roll" or "to cruise around". It's a less common, more colloquial term than simply "caminar" (to walk) or "manejar" (to drive).
In the context of the song, it describes people, likely the "colegial de los grandes" (the big-time college students/crew), moving around the streets. It evokes a sense of casual movement, perhaps implying a certain swagger or a routine of patrolling their territory, making it an interesting and evocative word choice.
Get ready to meet "El Pecas" by Grupo Recluta! This song is all about a guy who's come a long way and earned his respect. He tells us, "me gane todo el respeto tiro a tiro se lo demostré" [I earned all the respect, shot by shot I showed them]. He sees himself as the "oveja negra de la casa por desgracia" [black sheep of the house, unfortunately], but he's proud to be "parado donde lo soñé" [standing where I dreamed it].
He takes us back to his youth, "esas tardes en san diego a los 14 el barrio le brinque" [those afternoons in San Diego at 14, I jumped into the neighborhood]. Now, he's living life to the fullest, saying "me escape hasta que el cuerpo aguante" [I'll escape until my body gives out]. He's got "mucha plata para los trompos" [lots of money for the tops] and "historias para contarles" [stories to tell you]. He's a warrior, carrying his father's blood, and he's not afraid to show it. This song is a real journey of self-made success and living life on your own terms!