A person, either male or female, who despite purchasing their clothes from highstreet stores, get particularly cranky if someone else has the same items as them. They may even go as far as to "ban" another person they know from owning the same item, even though its store of origin is commonly used.
"Sarah got grumpy with me because I said I wanted the skirt she had"
"Oh just ignore her, it's not like it's designer. She's such a High Street Hogger"
"Dude, where's your shirt from?"
"Wal Mart. But you can't get it, I don't like people having the same stuff as me!"
"Oh don't be such a High Street Hogger"