He whistled for attention before starting his speech.
help
Frequency:
60
%
She whistled for help when she got lost in the woods.
his dog
Frequency:
50
%
He whistled for his dog to come back to him.
a response
Frequency:
35
%
She whistled for a response from the audience.
Idiomatic Expressions for whistle for
Phrase: whistle for a cab
Meaning: to wait for a long time without any success in getting a cab
Usage: We were whistling for a cab for over half an hour before one finally stopped for us.