| gossamery |
| hammy(mock, affected, impromptu) |
| high falutin(expression, mock, affected, impromptu) |
| immaterial(fake, false, imaginary, fanciful, illusory) |
| impalpable(fake, false, imaginary, fanciful, illusory) |
| impromptu(mock, affected) |
| improv(mock, affected, impromptu) |
| improviso(mock, affected, impromptu) |
| incredible(imaginary, illusory, dreamlike) |
| insincere(fake, false, imaginary, fanciful, illusory) |
| insubstantial(fake, false, imaginary, fanciful, illusory) |
| intangible(fake, false, imaginary, fanciful, illusory) |
| la-di-da(mock, affected, impromptu) |
| make-believe hypothetical(expression, fake, false, imaginary, fanciful) |
| manmade(mock, affected, impromptu) |
| mimetic(mock, affected, impromptu) |
| nebulous(fake, false, imaginary, fanciful, illusory) |
| non-existent |
| not genuine(expression, mock, affected, impromptu) |
| not kosher(expression, mock, affected, impromptu) |