A dictionary of Confusable Phrases: More Than 10,000 Idioms and Collocations

Note: 
Neither expression correlates in meaning with the phrase
blow someone out of the water
—(sl.) 
1
. utterly surprise a per-
son: To say the film exceeded my expectations is an under-
statement; it completely blew me out of the water. 2. defeat a
competitor decisively: They also believe that if they fall behind
in the functionality race, the competition will blow them out
of the water.
blow someone’s brains out • blow someone’s mind
blow someone’s brains out—kill smb. by shooting : Smith
wouldn’t do anything so supposedly masculine as cold-blood-
edly blow someone’s brains out with a shotgun.
blow someone’s mind —cause excitement or the state of ec-
stasy; overwhelm a person: The beauty of the African wildlife
parks blew my mind completely during our trip.
Blue Bird • bluebird
Blue Bird —is used as a symbolical expression of happiness:
All these ladies have tried to catch this same Blue Bird.
bluebird —
1
. any of several birds that have blue feathers: We
were fortunate to see such birds as a sky-blue mountain blue-
bird. 2. (Drug users) a depressant; a blue capsule or tablet con-
taining barbiturate: Here, this little bluebird will sing you to
sleep.
Note: 
The compound does not correlate in meaning with the
phrase blue canary—an emergency worker (a firefighter or a law
enforcement officer) whose death alerts other personnel to a haz-
ardous situation (from the use of canaries in coal mines, whose
death would alert miners to the presence of dangerous gases): The
“blue canaries,” as police and firefighters are sometimes called,
would probably suffer heavy casualties until the (chemical)
agent is identified.