spiderbrain Share definition Flag To be high/stoned and feel your brain tingle as if spiders were crawling upon it. OMG this shits dank *puff puff pass*.....*30 minutes later*Dude... I feel like I have spiderbrain. spiderbrain by darklette90 May 6, 2011 0 0 Get merch Get the spiderbrain mug. Buy Now — $32.95 See more merch