be down
Be depressed, in low spirits, as in During the winter months Sue's always down, but spring cheers her up. [Colloquial; mid-1800s]
Be knowledgeable, canny, or sophisticated, as in He was really down with the new group. This usage probably originated among jazz musicians. [Slang; mid-1940s]
Words nearby be down
be a credit to,
be along,
be big on,
be bound to,
be busted,
be down,
be had,
be in on,
be into,
be my guest,
be off