Usurper whistler

[Ernesto]

noun. [Mortal enemy] to the [public whistler]. A person of dominant mentality who, upon hearing a public whistler performing, also begins to whistle. [Usurper] whistling is a coup attack upon the public whistler. The [usurper] whistler can be identified by the fact that s/he is always whistling louder and usually faster than the public whistler.
verb. usurp-whistle