шара́хнуться

verbreflexiveperfective (partner шара́хаться)very rarely used (#12849)

1.
to shy away, to dash aside, to recoil, to start back
Толпа́ шара́хнулась в сто́рону.
The crowd shied away to the side.
Colloquial; of a sudden frightened movement away from something.
2.
to bang oneself (against), to crash (into), to slam (into)
Он шара́хнулся голово́й о ни́зкую дверь.
He banged his head against the low door.
Colloquial; usually with о + accusative.
3.
(rare) to go crazy, to go nuts, to lose it
Ты что, шара́хнулся?
Have you gone completely nuts?
Slang, usually in questions or reproaches.

Examples

Лошадь шарахнулась от громкого звука.
The horse shied away from the loud noise.
Прохожие шарахнулись в сторону от машины.
The pedestrians jumped aside to get out of the car’s way.
Кот шарахнулся от неожиданного шума.
The cat recoiled from the unexpected noise.

Imperative
ты	шара́хнись
вы	шара́хнитесь

Active present	-
Active past	шара́хнувшийся	having recoiled, having shied away, having flinched
Passive present	-
Passive past	-
Gerund present	-
Gerund past	шара́хнувшись	while doing (past)