(knitting) Initialism of yarn backward.

(computing, formal) yottabit (1000 zettabits or 1000⁸ bits) / (computing, informal) yobibit (2¹⁰ (1024) zebibits or 2⁸⁰ (1024⁸) bits)

(computing, formal) yottabyte (1,000 exabytes or 10²⁴ bytes) / (computing, informal) yobibyte (2¹⁰ (1024) zebibytes or 2⁸⁰ (1024⁸) bytes).

(archaeology, geology, paleontology) Initialism of years before present.

Alternative form of YBP

(Canada, US, slang) Initialism of you bet your sweet ass I am: a strong affirmative response.

(archaic) past participle of blend

(archaic or poetic) Confused

(obsolete) past participle of bear

past participle of bring