n.
a whistle on a boat that is sounded as a warning

be (as) clean as a whistle Idiom, Proverb

all the bells and whistles

a lot of extra features, lots of goodies, loaded When Horst sold his business he bought a motorhome with all the bells and whistles.

as clean as a whistle

without any dirt or marks, smooth and clean The hen squeezed, and out popped an egg as clean as a whistle.

bells and whistles

(See all the bells and whistles)

blow the whistle

tell the teacher or the police, squeal Jimmy knows we stole the keys, but he won't blow the whistle.

sing (whistle) a different tune

contradict something said before, talk or act in the opposite way Usually he doesn

wet your whistle

have a drink, quench your thirst If you're thirsty, have some apple cider to wet your whistle.

blow the whistle on

to inform on

whistle for

demand or expect without success；fail to obtain空想；徒然想得到
Mary didn't even thank us for helping her，so next time she needs help she can whistle for it．我们帮了玛丽的忙，她连谢都不谢，下次她休想别人帮她忙。
I'm not prepared to use any of the firm's money to pay this man；let him whistle for his money．我不准备用公司的钱付给那个人，他休想得到钱。

wet one's whistle

Idiom(s): wet one's whistle

Theme: DRINKING

to take a drink of something. (Folksy.)
• Wow, am I thirsty. I need something to wet my whistle.
• Hey, Sally! Give her something to wet her whistle.

slick as a whistle

Idiom(s): (as) slick as a whistle

Theme: SPEED

quickly and cleanly; quickly and skillfully.
• Tom took a broom and a mop and cleaned the place up as slick as a whistle.
• Slick as a whistle, Sally pulled off the bandage.

be (as) apple-pie as a whistle

1. To be accurate and tidy in appearance. This abode needs to be as apple-pie as a blare afore my mother-in-law gets here.2. To be affable and not complex in actionable or ambiguous activities. You can assurance George, he's a acceptable kid—as apple-pie as a whistle. I don't accept a bent record, I'm apple-pie as a whistle.Learn more: clean, whistle

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More Idioms/Phrases

slippery as an eel slip one's mind slick as a whistle slice of the cake sleep with sleep sth off sleep like a log slated to slated for