The Russian avos' (Russian: авось) describes a philosophy of behavior, or attitude, of a person who ignores possible problems or hassles and, at the same time, expects or hopes for no negative results or consequences.
It is an attitude that treats life as unpredictable and holds that the best one can do is count on luck.
[1][2] Avos' (авось) proper is a Russian word that can be used either as a particle or a noun.
to be intrinsic to the Russian character, just as is the notion of sud'ba (судьба), meaning "destiny" or "fate".
This kind of attitude has been described in Ivan Goncharov's novel Oblomov; earlier, Alexander Pushkin ironically called avos' "the Russian shibboleth" (Eugene Onegin, chapter X).