i was also curious about "He's so mauve we don't know what he's planning" so i looked up the word mauve and found this:
answers.com wrote:In the classic Bruce Robinson film Withnail and I, Montague Withnail declines his nephew's offer of sherry with the explanation "Oh dear no, no, no. I'd be sucked into his trap. One of us has got to stay on guard. He's so mauve we don't know what he's planning." He fears alcohol may cloud his judgement and weaken his determination to engineer a private encounter with Marwood (accused of mauveness in the quotation) on Monty's terms. Marwood wishes to avoid such an encounter on any terms, but regardless of this he is as unlikely as the viewer to understand any literal meaning in having this colourful adjective applied to him. Whether that uncertainty is its own explanation, given what we later come to know of Monty's (cruelly misinformed) understanding of Marwood's lifestyle choices, and Marwood's own ambiguous reaction in several scenes to Monty's advances, is a question left unanswered until much later, ironically in opposite ways in the minds of the two protagonists.
anyone got any other queries?