|look down your nose at
||look at a person as though he is not as good as you
||Just because he's rich he looks down his nose at us.
|look high and low
||look everywhere, leave no stone unturned
||We've looked high and low for that watch, but we can't find it.
||investigate, find the facts, get to the bottom of
||The principal will look into the attendance problem and see what is causing it.
|look like death warmed over
||appear to be sick, look pale or weak
||Mom is not feeling well. She looks like death warmed over.
|look like he was dragged through a knothole
||appear to be very tired, burn out, run down
||After a divorce and a funeral, Anne looked like she'd been dragged through a knothole.
||Look out! That knife is sharp.
|look out for
||watch, protect, look after
||Please look out for your sister. She needs your protection.
|look out for number one
||help yourself first, get enough for yourself
||You can look out for number one as well as help your friends.
||check, examine, look at
||I've looked over the report. It contains the data we need.
|look over your shoulder
||look to see who is following you
||He's always looking over his shoulder to see who's after him.