To be on ice 的意思是暫緩、擱置某個決定或計劃。換句話說就是暫時先不考慮某件事了。
I've had to put my trip to the Caribbean on ice as I need the money to get my car repaired.
All development projects are on ice until we receive more funding.
另一個非常相似的短語 to be on thin ice 的意思是如履薄冰，處境困難。
John opened a luxury goods shop in 2008. He was on thin ice when the recession started.