old-fashioned

something that you say which means there will soon be problems because of something that has happened.

Susie knows you've been seeing her boyfriend, so the fat's in the fire.

• a bitter pill
• a bitter pill to swallow
• a bit too much
• a black day
• a black mark
• a blank cheque
• a blast from the past
• a bleeding heart
• a blessing in disguise
• a blind alley
• a blind date
• a blind spot
• a blood brother
• a blot on the landscape
• a blow job
• a blue-eyed boy
• a bodice-ripper
• a body blow
• a bolt from the blue
• a bone of contention
• a bone to pick with
• a bone to pick with someone
• a bon mot
• a bon viveur
• a bossy boots