Closest pal, in IM shorthand

• Closest bud, briefly
• Closest chum, in texts
• With whom you might have a Snapchat streak, informally
• Lifelong pal, briefly
• Person who might be chosen to be maid of honor, for short
• Mate 4 life?
• Texter's #1 pal
• Lifelong bud
• Closest buddy, to a texter

Wiktionary Word definitions in Wiktionary
n. (context text messaging Internet slang English) (initialism of best friend forever English)