off the top of one's head

In an impromptu way, without much thought, as in Off the top of my head I'd say we'll double our profits in a year. This idiom suggests one has not used the inside of one's head before making some statement. [Mid-1900s]

Common Names:

Name	Pronounced	Usage
Bevin	-	Irish
Isabel	ee-sah-BEL (Spanish), IZ-ə-bel (English), ee-za-BEL (French), ee-zah-BEL (German)	Spanish, Portuguese, English, French, German
Bristol	BRIS-təl	English (Rare)
Muir	-	Scottish
Apollinaris	-	Ancient Greek
Bartek	-	Polish