rojíti to swarm; to swarm like bees
v deželi roji divjačine the region is swarming with game
v mestu roji (mrgoli) špijonov the town is swarming with spies
v glavi mi roji neka misel an idea keeps running through my mind
samó letala mu rojé po glavi he thinks and talks aeroplanes
čudne muhe mu rojé po glavi (figurativno) he's got bats in the belfry