From brain + teasing. <span class="searchmatch">brainteasing</span> (not comparable) (informal) Puzzling; mentally challenging. a <span class="searchmatch">brainteasing</span> riddle brainteaser...
teaser. (General American) IPA(key): /ˈbɹeɪnˌtizɚ/ brainteaser (plural brainteasers) (informal) A difficult problem or puzzle. <span class="searchmatch">brainteasing</span> brainteaser...
brain surgery braintape brain-tape brainteaser brain-teaser, brainteaser <span class="searchmatch">brainteasing</span> brain-tickler, puke for brains brain tiredness brain traffic brain trick...