simple past tense of break one's back

present participle of put one's back into

present participle of break one's back

past participle of break one's back

Third-person singular simple present indicative form of put one's back into

Third-person singular simple present indicative form of break one's back

(informal, idiomatic, chiefly finance, chiefly US) To take advantage of favourable pricing by purchasing a large amount.

Rhipidura rufidorsa, a species of Rhipiduridae bird.

(literally) To remain wary of being attacked from behind by surprise; to remain watchful to prevent a predictable attack from being a surprise.

Ficedula elisae, a species of perching bird.