tool

[Arnold M. Zwicky]

from the Firesign Theatre's "The Further Adventures of Nick Danger",
on the LP How Can You Be In Two Places At Once When You're Not Anywhere
At All (1969):

Nancy: Oh Nick, you're such a tool!

(my reading of the scene is that 'stupid person', 'inept person', and
'person being taken advantage of, being used as a tool' are all evoked
by "tool".  various senses of "fool" might be in there, too.)

arnold