How strange. I had never heard this expression until last night when ds (aged 7) said it to himself. For the last few weeks he has been plagued by a fear of burglars coming in through the attic windows to "get us". We have had lots of nights spent discussing it and rationalising it, I wasn't sure where it would end until last night, he sat in bed and shouted:
Right that's it, I've just got to suck it up and get over this nonsense about burglars.
I thought it made sense actually.