good riddance
one is glad that someone is leaving or that something has gone
in one fell swoop
all at once
one's own flesh and blood
a member of the family
elbow room
space to move around in
the be-all and end-all
essential element of something
wild goose chase
An absurd or hopeless pursuit, as of something(usually beccause someone gives you the wong information or you have too little time to find it)
a sorry sight
a bad condition or situation
to lie low
to hide