What is "it is odds"

Odds \Odds\ ([o^]dz), n. sing. & pl. [See Odd, a.]

1. Difference in favor of one and against another; excess of one of two things or numbers over the other; inequality; advantage; superiority; hence, excess of chances; probability. The odds are often expressed by a ratio; as, the odds are three to one that he will win, i. e. he will win three times out of four ``Pre["e]minent by so much odds.''
   --Milton. ``The fearful odds of that unequal fray.''
   --Trench.

   The odds Is that we scarce are men and you are gods.
   --Shak.

   There appeared, at least, four to one odds against them.
   --Swift.

   All the odds between them has been the different scope . . . given to their understandings to range in.
   --Locke.

   Judging is balancing an account and determining on which side the odds lie.
   --Locke.

2. Quarrel; dispute; debate; strife; -- chiefly in the phrase at odds.

   Set them into confounding odds.
   --Shak.

   I can not speak Any beginning to this peevish odds.
   --Shak.

   At odds, in dispute; at variance. ``These squires at odds did fall.''
   --Spenser. ``He flashes into one gross crime or other, that sets us all at odds.''
   --Shak.

   It is odds, it is probable; same as odds are, but no longer used. [Obs.]
   --Jer. Taylor.

   odds are it is probable; as, odds are he will win the gold medal.

   Odds and ends, that which is left; remnants; fragments; refuse; scraps; miscellaneous articles. ``My brain is filled . . . with all kinds of odds and ends.''
   --W. Irving.

   slim odds low odds; poor chances; as, there are slim odds he will win any medal.