1 definition by Spikey

1. A small dog that seems to me small enough to fit into an average sized box.

2. A very small dog
Mikey: "That is small fucking dog!"
Will: "It's a 'Box Dog'"
Mikey: "What the fuck?"
Will: "A box dog"
Mikey: "Oh, ok"
by Spikey July 12, 2004
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