The other kids 'ragged' [='teased, razzed'] him for having a crush on the teacher.
The other kids were always 'ragging on' me because I wasn't good at sports.
a homeless person wearing 'rags' = a homeless person (dressed) 'in rags'
(..) Look at the cute little baby, Diego. Isn't it nice if he joining us for breakfast? It wouldn't be breakfast without him . His daddy wiped our hair for pack. And rag our skin to keep warm . And ruin our lives. Don't you think? Let show that human what happen when he messed with Sabers. (..)2002 Ice Age