Close pals, in teen slang

• Permanent pals, 4 short
• Very close pals, briefly
• Lifelong pals, less formally
• Close pals, for short
• V close pals
• Close buds
• Very close ones, for short
• Ride-or-die pals, briefly
• Inseparable middle sch. pals, perhaps

Wiktionary Word definitions in Wiktionary
n. (BFF English)