making off the top of ones head (verb) coin: create, invent
Sinonime: absorbed, at work, committed, connected with, dealing in,
deep,
doing,
employed,
engrossed,
immersed, in place, in use,
intent,
interested,
involved,
occupied,
performing, practicing,
preoccupied,
pursuing,
rapt, signed, tied up,
unavailable,
working, wrapped up
Antonime: disengaged, inoperable, not working