likely as not

likely as not

Probably; most likely. During lunch, you'll find Mrs. Smith preparing lessons in her office, as likely as not. Likely as not, we'll just have to pay a fine since we're first time offenders.
See also: likely, not

*likely as not

Fig. probably; with an even chance either way. (*Also: as ~.) He will as likely as not arrive without warning. Likely as not, the game will be canceled.
See also: likely, not