A "blue cloud" is a dangerous area effect resulting from rapid, sustained utterances of profanity. Those in the area of effect experience either
anxiety or elation depending on their idiosyncracies. Often encountered at
truck stops or in the homes of
desperate housewives. See also "turn the air blue".
If this
therapist dislikes profanity, it won't
work for
us, because there'll be a blue cloud of profanity in the room.