Definition of Linus blanket in US English:

Linus blanket

noun

US
figurative
  • An object (or occasionally a person) depended upon for reassurance and comfort; a habitual source of pleasure or consolation.

Origin

1950s. From Linus, the name of a small boy who carries a cot blanket for comfort in Peanuts by American cartoonist Charles M. Schultz + blanket.

Pronunciation

Linus blanket

/ˈlʌɪnəs blaŋkɪt/