Since having my last baby, my arse has GONE.
I don't really care except........my knickers won't stay up! 
I have a brand new pair of Primark leggings on today and they won't stay up either! 
I'm obvs still apple shaped since the birth, so now jeans look ridiculous - anything that fits me on the waist has all this empty air around my arse. I have the waist/bum ratio of an old man!
Can anyone recommend any styles to accommodate or hide it?