When you have a conversation with someone while writing on a desk, table, etc.

Mostly done at school with a pencil on a desk when you're ridiculously bored. You write messages for other people in other periods, and someone else who's ridiculously bored will reply-thus, a desk message!
Desk messaging is the way pilgrim kids used to text message.
by JustxKidding October 1, 2009
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