BF

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++BF /biː ˈef/ noun [countable]  1. the abbreviation of best friend – used by young people and in magazines / best friend 的缩写，最要好的朋友〔年轻人或杂志上使用〕2. the abbreviation of boyfriend – used by young people and in magazines / boyfriend 的缩写，男朋友〔年轻人或杂志上使用〕

BF nounChinese  

BF
BF /biː ˈef/ noun [countable]
1. the abbreviation of best friend – used by young people and in magazines
2. the abbreviation of boyfriend – used by young people and in magazines

BF (also bf) BrE /ˌbiː ˈef/ 🔊NAmE /ˌbiː ˈef/ 🔊 abbreviation (informal) (especially in text messages, emails, etc.) boyfriend; best friend 男朋友，最好的朋友（全写分别为 boyfriend 和 best friend，尤用于短信、电邮等）