daftnut
A daftnut is a person who won’t share their snack with you but will give it to someone else who doesn’t even ask. They’re selfish and clueless.
You: 'Can I have a chip?' Daftnut: 'Nope.' Then they hand the bag to the guy next to them.
You ask for a sip of soda. They say 'No way!' but pour the whole can into their friend’s cup.
You’re hungry. They have a sandwich. They ignore you but give it to their pet.