humdinger /hum-dingˈər/ (slang)

1. An exceptionally excellent person or thing
2. A smooth-running engine
3. A swift vehicle or aircraft

• crop-dusting
• crop-ear
• crop-eared
• crop-ears
• cropful
• cropfull
• cropfuls
• cropland
• croplands
• crop-marks
• cropped
• cropper
• croppers
• croppies
• cropping
• croppings
• croppy
• crop rotation
• crops
• cropsick
• crop top
• crop tops
• croquante
• croquantes
• croque-monsieur