- infested with grubs, esp. with botfly larvae, as cattle or sheep
- dirty; messy; untidy
- inferior, contemptible, mean, etc.
- Dirty; grimy: grubby old work clothes. See Synonyms at dirty.
- Infested with grubs.
- Contemptible; despicable: has a grubby way of treating others.
(comparative grubbier, superlative grubbiest)