Something that supposedly doesn’t take much intellectual thought. Whoever says that something is a no brainer is usually the one with no brains.
NNX - NNY - NNYLN - NNZ - NO - NO DL - NO MAAM - No Slack - No Telling - No Way in Sam hell
"NO BRAINER." Abbreviations.com. STANDS4 LLC, 2015. Web. 29 Nov. 2015. <http://www.abbreviations.com/NO%20BRAINER>.