baud barf /bawd barf/ n.
The garbage one gets a terminal (or terminal emulator) when
using a modem connection with some protocol setting (esp. line
speed) incorrect, or when someone picks up a voice extension on
the same line, or when really bad line noise disrupts the
connection. Baud barf is not completely random, by the way; hackers with a lot of
serial-line experience can usually tell whether the device at the
other end is expecting a higher or lower speed than the terminal
is set to. Really experienced ones can identify
particular speeds.