post haste's Usage Examples:

They have released a number of albums, their latest being dear post haste (2020).

appeal for help to the Maharaja to dispatch reinforcements from Lahore post haste, however his letter was not forwarded to the Maharaja by the Dogra chiefs.

drawings could also have repeated written directions as "haste haste", "post haste", "haste for life", "for life haste", etc.

want to receive advertising, the advertiser must abide, unconditionally, post haste, but no later than 3 months of receipt of the request.

headed by the owner, Kapoor, who has ordered that Ramaiya be eliminated post haste.

Synonyms:

precipitateness; precipitation; fastness; hurriedness; abruptness; precipitousness; suddenness; hastiness; precipitance; hurry; swiftness; speed; precipitancy;

Antonyms:

movableness; courtesy; gradualness; stay in place; delay;