<jargon> 1. Any completely inoperable system or component, especially one that has just crashed and burned: "Uh, oh ... I think the serial board is toast."
2. To cause a system to crash accidentally, especially in a manner that requires manual rebooting. "Rick just toasted the firewall machine again."
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Nearby terms: TNXE6 « to « to a first approximation « toast » toaster » toasternet » to a zeroth approximation