|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.|
A group of experts who serve as advisers to a government or an organization: “Before being appointed to the cabinet, Brown had been a leading figure in a financial brain trust.”
A group of experts who serve as unofficial but vital advisers. For example, Each town manager seemed to have his or her own brain trust, which of course changed with every election. This term, closely associated with President Franklin Roosevelt's advisers on domestic and foreign policy in the early 1930s, was first recorded in 1910.