"Hang on a sec," online

• "Hang on a sec," to a texter
• "Returning soon," in texts
• "Have to step away for a sec," breifly
• "I'll return soon," when texting
• "Just a sec," in text-speak
• Cybertalk for "I shall return momentarily"
• "Give me a sec," in texts
• "Gimme a minute," in an online chat
• "hold on 1 sec ok?"

Wiktionary Word definitions in Wiktionary
init. (alternative case form of BRB nodot=1 English) (gloss: be right back).