a filthy or soiling substance, e.g. mud or grime
informal excrement
dog dirt
somebody or something worthless or contemptible
earth; soil
informal
obscene or pornographic speech or writing
scandalous or malicious gossip
Do you have any dirt on the new manager?
do somebody dirt
informal to deliberately do something that will harm the reputation, position, etc of (somebody)
treat like dirt
informal to treat (somebody) very badly, as if they are of no value or significance
[Middle English drit, from Old Norse]