| expressionless |
| flaky(unstable, disturbed, erratic, unhinged) |
| freaky(unstable, disturbed, erratic, unhinged) |
| inexpressive(adjective, dull, dead, impassive, unresponsive) |
| insane(unstable, disturbed, unhinged) |
| inscrutable(adjective, dull, dead, impassive, unresponsive) |
| irrational(unstable, disturbed, unhinged) |
| kinky(unstable, disturbed, erratic, unhinged) |
| kooky(unstable, disturbed, erratic, unhinged) |
| lackluster(adjective, dull, dead, impassive, unresponsive) |
| lunatic(unstable, disturbed, unhinged) |
| mad(unstable, disturbed, unhinged) |
| no-show(depressed, out, preoccupied, missing) |
| no show(expression, depressed, preoccupied) |
| non compos mentis(expression, idiom, unstable, disturbed, erratic) |
| not all there(expression, idiom, unstable, disturbed, erratic) |
| nutty(unstable, disturbed, erratic, unhinged) |
| out of the country |
| out to lunch(expression, idiom, unstable, disturbed, unhinged) |
| pokerfaced(adjective, expressionless) |