to say something unintentionally that was meant to be secret
случайно сказать что-то, что должно было остаться в секрете (sluchayno skazat' chto-to, chto dolzhno bylo ostatsya v sekrete)
"She let it slip that she was moving abroad."
"Она случайно проболталась, что она переезжает за границу." (Ona sluchayno proboltalas', chto ona pereezhayet za granitsu.)
to take a foolish risk that may bring bad luck
to find small, unimportant faults in something
completely exhausted or near collapse
to stop communicating with someone
to reserve something for a particular purpose
Going from a bad situation to an even worse one.