a person who is mischievous and has unclear intentions, a dirty child, someone who is unkept and drops crumbs while making eye contact
Look at Zach over there in his cutoff spongebob pajamas, what a grub.
A person that is dirty and lacks proper hygiene
Do you know that girl Meg? She hasn’t showered in a week, she is a real grub !
Grub is a just a good way to say “food” and that’s all the definition you need, I mean, how else can I define this?
Person 1: Hey wanna get some grub?
Person 2: Ok