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

call names • name names
call names —subject a person to angry or violent attack in
words: He replied to my innocent jokes by calling names.
name names —mention people (involved in some reprehen-
sible activity) by name: Valachi has named names and drawn
a master plan of the Syndicate (which the underworld refers
to as Cosa Nostra).
Note: 
The expression does not correlate in meaning with the
phrase drop names—(also: name-drop) familiarly mention the
names of distinguished people in order to imply one’s own impor-
tance: The man who shot her, incidentally, is called Lord Lich -
field — just one of the names dropped thuddingly at every op-
portunity.
call of duty • duty call
call of duty —smth. that a person is required to do by one’s
moral or social obligations: It was cruel of me to ask him to
recount the events of the fateful day but it was the call of duty.
Cf.: (above and) beyond the call of duty — doing much more than
should normally be expected of one (originally of heroic police
officers, fire fighters, etc.): The deep level of care and compassion
that was demonstrated to me was beyond the call of duty.
duty call —a visit undertaken as a duty or as part of one’s
social obligations: They had accepted a dinner invitation over
in Arlington — a duty call, as Andy termed it.
call of nature • call of the wild
call of nature —
1
. the urge to go and explore new (undevel-
oped) regions: I felt the call of nature most strongly and began,
like the citizens in Hardy’s poem, to “dream of the south and
west.” 2. (euph.) is used of a need to go to the toilet: He would
suggest dropping in at the Monico, pretext a call of nature. 3.
said of the natural desires and instincts: You must expect
George to start being interested in girls at his age. It’s the call
of nature.
call of the wild — = call of nature 
1
: Several times my father
made an attempt to settle down, but the call of the wild would
prove too strong.