someone who appears harmless but is actually dangerous
тот, кто выглядит безобидным, но на самом деле опасен (tot kto vyglyadit bezobidnim no na samom dele opasen)
"He was a wolf in sheep's clothing."
"Он был волк в овечьей шкуре." (on byl volk v ovechey shkure)
to deliberately annoy or upset someone
to control something or someone secretly
used humorously to let an older person go first
to give someone or something a fresh start or new energy
to repeat a mistake despite knowing it’s wrong
a small problem that is exaggerated