Headfirst

Adverb

 * 1) With the head in front; headlong

Adjective

 * 1) With the head in front; headlong

Thesaurus
a corps perdu, abruptly, carelessly, desperately, furiously, happen what may, hastily, head over heels, headforemost, headlong, heedlessly, heels over head, helter-skelter, holus-bolus, hotheadedly, hurriedly, hurry-scurry, impetuously, impulsively, like crazy, like mad, madly, overeagerly, overenthusiastically, overzealously, precipitantly, precipitately, precipitously, ramble-scramble, rashly, recklessly, slam-bang, slap-bang, slapdash, suddenly, wantonly, wildly