With energetic speed; quickly, speedily. Hence also in in all haste: as quickly as possible, with all speed.

Phrases. a fair crack of the whip (colloquial): a fair chance to participate or act. †to drinkor lick (up) on the whip: to have a ‘taste’ of the…

Scottish. at (the) post: = in post at phrases 4. Obsolete.

in post: in the manner or capacity of a courier or bearer of dispatches; (hence) at express speed, in haste. See also post-haste, v. Obsolete.

colloquial (chiefly regional). A rage, a temper; a state of agitation.