two heads are better than one

(informal) not to go in for half measures

something is rotten in the state of Denmark

(informal) Said of something that is seemingly endless, never-ending or inexhaustible.

Alternative spelling of y a

(Quebec, colloquial) contraction of ils + ont

(informal) Alternative form of il n'y a plus de jeunesse

(informal) now all we have to do is to put that into action, and now you gotta put that into practice (now that someone knows all that there is to know about something, there's nothing left but to do it)

Alternative form of quand il n'y en a plus, il y en a encore

the Yaaku language