Brb in 5 is what a user will state if they simply do not have the time to state brb in five SECONDS, brb in five MINUTES, brb in five HOURS, brb in five DAYS, or brb in five YEARS. The user might also state this if they do not know when they shall return.
Bob: brb in 5
Jim: Brb in five years, brb in five days, brb in five seconds, brb in five hours, or brb in five minutes?
7👍 5👎