脑抽

脑抽	nǎo chōu	(slang) to have a brain fart; to act stupidly
脑	nǎo	brain / mind / head / essence
抽	chōu	to draw out; to pull out from in between / to remove part of the whole / to inhale (esp. smoke) / (of fabric etc) to shrink / (of certain plants) to sprout; to bud / to whip; to thrash / classifier for sheets (of tissues, wet wipes etc)