A person who lacks
intelligence.Can be at very age.It means the person doesnt have a lot of
knowledge in different situations but mostly does actions which normal people consider to be uncommon and not responsible.Also they
may find it difficult to obey a certain rule.
"I told her 3 times not to
eat others
leftovers but she still doesnt understands it,she is so stupid."
"She really got into
relationship with my ex...gosh she is stupid!