Scottish. to bo a person's blanket: to reproach or criticize a person in the slightest. Only in negative constructions. Cf. to say bo to a person's blanket at boint. Phrases 2, to say boo to a person's blanket at booint. and n.1 Phrases 1b.
ΚΠ
a1823 G. Beattie in John O'Arnha' & Other Poems (1826) 80 I can gae up throw a' the street, And nane gan bo' my blanket.