1. a side-splitting joke
2. living in the lap of luxury
3. The Three Musketeers
4. the spittin' image
5. Little Boy Blue
6. nominal (no "m" in "al")
7. raisin bran (RA is in BRAN)
8. Lost in Space
9. too good to be true
10. middle aged
11. back door
12. go up in smoke