In an impetuous manner; with great impetus or force; violently, vehemently; with sudden or rash energy.

Of a fluid: Fiery, hot. Hence, in flagrant blood, opposed to in cold blood at cold blood, n. Obsolete.

Phrases. to lay it on thick: see 1c. thick and fast: see 3. thick and threefold adv. (n., adj.) phr. With vehemence; fervently, ardently…

With the head going first or in front of the rest of the body; head first. Also figurative: precipitately, hastily; headlong, recklessly.

figurative and in figurative contexts. Precipitately, hastily; rashly, impetuously, recklessly.