Third-person singular simple present indicative form of whistle.(verb)
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Use "whistles" in a sentence
"$ 2 Million for a URL-shortening service + Analytics + bells and whistles is a huge figure no matter which way you look at it."
"Monday, April 6 2009 ok Gmail blow your candles, you are getting old & slow, sending a mail from gmail/google apps takes a long time. not sure if the pipes are to be blamed or all the bells & whistles from the lab? has any one noticed?"
"So easy-to-use and no technical training but with all the bells and whistles is what you want."