A description of someone (usually at school) who no one likes and has no mates and couldn't get someone to remotely like them to save their fucking life
British Slang A person with no friends, or at least someone who appears that way.
Other similar uses:
1) On his bill - On his own
2) Has been billied - Has been abandoned (by friends)
3) A billy - one with no friends
"That Danny lad is a right billy-no-mates."
"Look at that lad over there on his bill."
"David's been billied! Haha!"
"Ryan is a billy..."
A individual with no friends. That guy you see sitting at the pub all alone trying to start start a conversation with whoever will give him some attention.
Hey Bro last I saw old Norman no-mates at the bud and he kept trying tocharity chat every person who walked up to order a drink