| brain-teaser or brain-twister | |
| —n | |
| informal a difficult problem | |
| brain-twister or brain-twister | |
| —n | |
brain-twister definitionand brain-teaser
|
| a gadget; dingus; thingumbob. |
| a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question. |