To pull down someone's trousers as a practical joke.
To fall (down); to fall to the floor.
To crash.
To be soundly defeated.
Used other than figuratively or idiomatically: see go, down.
To be received or accepted.
To be pleasant, etc., when eaten or drunk.
To perform oral sex.
To decrease; to change from a greater value to a lesser one.
To take place, happen.
To sink.
To be blamed for something; to be the scapegoat; to go to prison.
To stop functioning, to go offline.
To be recorded or remembered (as).
Synonym of set, to disappear below the horizon.