Top definition
Unsolicited and unwelcome e-mail received from and authored by or on behalf of a governmental body, entity or branch that is directly intended to promote a political goal, policy or agenda of such body, entity or branch.
"Did you receive any O-Mail from the White House yet?"

"Not so far; my e-mail address probably isn't on their list yet."
by B from B August 14, 2009
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