He just uses it to write a sign on the door. It makes more sense if you continue to watch to when Thorin Oakenshield arrives and says "I would never have found this place but for the mark on the door".
He makes a sign on Bilbo's door that the dwarves interpret to mean "burglar for hire", which brings them into Bilbo's house.
It was TNN.
spike is a boy
Green
Spike Dykes
Spike Christie goes by Spike.
supaiku is spike as in railway spike Kasui is spike as in the thorn of a bush
A homonym for spike is "spike," as it can refer to both a sharp-pointed object and a sudden increase or surge in something, like a temperature spike or a spike in interest rates.
A spike
Spike ChanneL Is On 25
a cooking spike is a Skewer
Spike has a British accent.