Idioms- Group 3&4

Get off someones back
stop bothering someone
String someone along
lead someone on dishonestly
Sell someone down the river
to betray someone
Sell someone short
to underestimate someone
Spill the beans
to reveal a secret
On ice
set aside for future use
Leave someone high and dry
to abandon someone
Shoot the breeze
chat informally
Bend over backward
try very hard
Hit the hay
to get some sleep
Hit the ceiling (or roof)
become very angry