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.
(..) Ho, ho, ho! Okay. On the count of three, I'll shoot the fire extinguisher and get him airborne. Howard, you wave the blanket and guide him towards the exit. Raj, you hold open the curtain so he can fly out. Are you sure a dummy like me can handle something as complicated as a blanket? Do you want the fire extinguisher? Yeah, I do. Great. Here you go. (..)2014 TvShow: The Big Bang Theory Title: The Clean Room Infiltration Season: 8 Episode 11