Significant Other is the second album by American nu metal band Limp Bizkit. Released in 1999 by Flip/Interscope Records, the album saw the band expanding its sound from that of its debut album Three Dollar Bill, Yall, to incorporate further metal and hip hop influences. Significant Other was co-produced by Terry Date and Limp Bizkit. The album has sold at least 16 million copies worldwide.

Significant other (SO) is colloquially used as a gender-neutral term for a person's partner in an intimate relationship without disclosing or presuming anything about marital status, relationship status, or sexual orientation. Synonyms with similar properties include sweetheart, better half, spouse, domestic partner, lover, soulmate, or life partner.