The witness was given 'blanket' protection from prosecution. [=the witness would not be prosecuted for anything]
The job was her 'security blanket'. [=the job was the thing that made her feel safe and secure]
A 'blanket' of gloom spread over the crowd when they realized their team would lose.
(..) that something is coming. Thanos! Whoa, whoa, whoa! Please don't put your eggs in me! Stay down, clown. Die, blanket of death! Everybody stay where you are. Chill the eff out. I'm gonna ask you this one time. Where is Gamora? (..)2018 Avengers: Infinity War