Severely intoxicated from alcohol, to the point of being unable to stand upright. On his 21st birthday, Jeff's friends took him to every bar in town until he was falling-down drunk.
falling down drunk
see under drunk as a lord.
falling-down drunk
1. mod. alcohol intoxicated; very drunk. Poor Fred is falling-down drunk and has no way to get home.
2. n. a drunken person who falls down. One more falling-down drunk in this neighborhood will not be anything new.