'Cut back on' means...
Go past without stopping
Reduce expenditure
Consume
'Cut out on' means...
Let down, snub
Move quickly to where someone is
Like something that you didn't like at first
'Cut back' means...
Eat unwillingly
Reduce
Form a pair with someone
'Cut off' means...
Disconnect
Find the size of something
Be quiet (often as an imperative)
'Cut up' means...
Leave work or school early
Have a lot of small injuries
Change TV channels quickly
'Cut down on' means...
Go to the airport, station, etc., to say goodbye to someone
Be less unhappy
Reduce
'Cut up' means...
Cut into smaller pieces
Become dimmer
Be depressed
'Cut out' means...
Remain longer than anticipated
Start eating enthusiastically
When an engine or motor stops
'Cut up' means...
Areest or take someone to a police station for questioning
Upset
Say something quickly without thinking, especially if you shouldn't
'Cut across' means...
Collapse
Catch a fish on a line and pull the line to land
Go across a place rather than around it to make the journey quicker