With the bind command it is possible to define custom key bindings.

The next example bind an Alt + w to >/dev/null 2>&1:

bind '"\\ew"':"\\" >/dev/null 2>&1\\""

If you want to execute the line immediately add \\C-m (Enter) to it:

bind '"\\ew"':"\\" >/dev/null 2>&1\\C-m\\""