[WAITS, via BSD UNIX]
1. n. A program that displays a
particular user or all users logged on the system or a remote
system. Typically shows full name, last login time, idle time,
terminal line, and terminal location (where applicable). May also
display a plan file left by the user.
2. vt. To apply finger to a username.
3. vt. By extension, to check a human's current
state by any means.
"Food?"
"T!"
"OK, finger Lisa and see if she's idle."
4. Any picture (composed of ASCII characters)
depicting 'the finger'. Originally a humorous component of one's
plan file to deter the curious fingerer (sense 2), it has entered
the arsenal of some flamers.