Break time is a server plugin found across all Source Servers. It allows a player to take a 10 minute break without the worry of getting kicked.
!break, /break, sm_break: Take a break!
!back, /back, sm_back: Come back early!
When joining a team during your break period, your break will end. The time until you're allowed another break is based on how long your previous break was. At the most, it is 1 hour of play before being allowed to take another break.