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обезумевший adj. stresses
gen.	distracted; distraught; unglued; berserk; distracted (от горя, забот и т.п.); as mad as a hatter (Svetlana D); out of one's head; out of one's wits; crazed (Pippy-Longstocking); mad (от чего-либо); mad as a March hare; panics-stricken
Gruzovik	panic-stricken; maddened; crazy; insane
inf.	unscrewed
Makarov.	mad as a March hare
slang	in a tizzy (Interex); wigged out (Interex)
обезуметь v
gen.	lose ones senses; see red; go off head; run amok; lose head; lose senses; be out of one's wits; lose one’s senses; lose one’s head; go mad; go bonkers
Gruzovik	go mad; lose one's senses; lose one's head
Игорь Миг	go berserk
inf.	go crazy (Andrey Truhachev); go bats (Andrey Truhachev); go nuts (Andrey Truhachev); run mad (Andrey Truhachev)
Makarov.	go off one's chump; go off one's head; go off one's nut; go round the bend; fall mad; go berserk; run amuck; run mad
prop.&figur.	go out of one's mind (igisheva)
psychol.	crack up разг. (Andrey Truhachev); go insane (Andrey Truhachev)
rude, Makarov.	go off chump; go off nut
scottish	go off at the nail; be go off at the nail; go off one's daft (Bobrovska)
slang	slide one's jib; slip one's trolley; go haywire (Interex)
обезумел v
inf.	out of your ass (What Women Want – if you tell anybody else that you can hear the innermost thoughts of a French poodle, you gotta be out of your ass... happyhope)

обезумевший: 37 phrases in 4 subjects

General	18
Informal	3
Makarov	15
Slang	1