[MIT; very common] The TMRC
definition was "FROB = a protruding arm or trunnion"; by
metaphoric extension, a `frob' is any random small thing; an
object that you can comfortably hold in one hand; something you can
frob (sense 2). See frobnitz. 2. vt. Abbreviated form
of frobnicate. 3. [from the MUD world] A command on some
MUDs that changes a player's experience level (this can be used to
make wizards); also, to request wizard privileges on the
`professional courtesy' grounds that one is a wizard elsewhere.
The command is actually `frobnicate' but is universally abbreviated
to the shorter form.