systems are a go
functioning correctly and ready for action
"all systems are a go"
all systems go
Everything is ready (from the use in aerospace industry as an indication that all preparations have been made to launch)
All systems go. We leave in 5 minutes.
all systems go
when one is defecating and feels the urge to urinate in consequence
dude i was taking a huge dukie and i felt the need to let all systems go