as likely as not

US /æz ˈlaɪkli æz nɑːt/
UK /æz ˈlaɪkli æz nɑːt/
"as likely as not" picture
1.

很可能, 多半

very probable; almost certain

:
As likely as not, he'll be late again.
很可能,他又要遲到了。
She'll as likely as not forget about the meeting.
很可能會忘記這次會議。