When the hamster begins to look good.
When the French guy said, "You're mother was a hamster and your father smelt of elderberries!" he was probably implying that Arthur's father was too drunk one critical night.
Too: More than enough; excessively: She worries too much.
Drunk: To bring to a specific state by drinking alcoholic liquors: drank our sorrows away.
Too drunk: The point at which a body becoems saturated with alchohol to the extent that respiratory functions and other 'important' functions to the body cease, without the possibility of re-starting.
Russell has never been too drunk.