Senses
老底儿/ 老底兒 the real story
someone's background or past history; the inside story or the truth of a matter
老底儿/ 老底兒 patrimony
family property or assets handed down through generations; ancestral property
老底儿/ 老底兒 one's father
(colloquial) a crude or informal way to refer to one's father
老底儿/ 老底兒 backup resources
something to fall back on; underlying strength or confidence based on one's resources or preparation
老底儿/ 老底兒 family background
family origin or pedigree; one's family history