in

cake walk: Idiom Meaning and Origin

butt in: Idiom Meaning and Origin

bug off: Idiom Meaning and Origin

brick in: Idiom Meaning and Origin

break in: Idiom Meaning and Origin

book in: Idiom Meaning and Origin

blue moon: Idiom Meaning and Origin

bird in the bosom: Idiom Meaning and Origin

be in for: Idiom Meaning and Origin

be in and out: Idiom Meaning and Origin

before it was cool: Idiom Meaning and Origin

bear in mind: Idiom Meaning and Origin