hòu tou
behind
in the back
the rear side
later
in future
lǎo shǔ tuō mù xiān , dà tóu zài hòu tou
when the mice drag a shovel, the biggest thing comes second
the tip of the iceberg
the cockroach principle
hǎo xì hái zài hòu tou
the best part of the show is yet to come
(with ironic tone) the worst is yet to come
you ain't seen nothin' yet