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| unhinged (scherfas) | |||
| go up the pole (LisLoki) | |||
| go gaga (I know I'm 73 but I haven't gone gaga yet! Val_Ships); be off beam (VLZ_58); fly off the handle (VLZ_58) | |||
| go off the rails (Lascutik); run amok (Andrey Truhachev); be going off the rails (Alex_Odeychuk); run mad (Andrey Truhachev); go mad (Andrey Truhachev); go crazy (Andrey Truhachev); go bats (Andrey Truhachev); go nuts (Andrey Truhachev); go cuckoo (VLZ_58) | |||
| go on the rampage (Andrey Truhachev); crack up coll. (Andrey Truhachev) | |||
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| binky-bonkers (It's too bad she was totally binky-bonkers–she could've had one helluva career as a witch. Бугаёва Н.Н.) | |||
| junkyard dog (VLZ_58) | |||
| rogue (Побеdа) | |||
| off one's trolley (Юрий Гомон) | |||