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быть сумасшедшим stresses
gen.	be round the twist; be nuts; be out of one's, right mind; mad
austral., slang	need one's head read
idiom.	have a bat in the belfry (Helene2008)
inf.	be off one's rocker (Andrey Truhachev); be off your rocker (Andrey Truhachev); have bats in the belfry (Andrey Truhachev); be not right in the head (Andrey Truhachev); be bats (Andrey Truhachev); be batty in the brain (Andrey Truhachev); have a screw loose (Andrey Truhachev); be crazy (Andrey Truhachev)
Makarov.	be out of one's right mind; be mad; be mentally deranged; be out of one's right mind; be deranged
slang	have wheels in one's head
vulg.	have all one's shit in one sock

быть сумасшедшим: 9 phrases in 5 subjects

General	2
Literature	1
Makarov	2
Rhetoric	1
Slang	3