when he's, it's, etc. at home?

who's (someone) when (he's/she's/they're) at home

humorous Who is that person? Primarily heard in UK. Robert De Niro? Who's he when he's at home? I've never heard of that actress before, who's she when she's at home?
See also: home

when he’s, it’s, etc. at home?

(British English, informal, humorous) used to emphasize a question about somebody/something: ‘Shirley Hills wants to meet you.’ ‘Who’s she when she’s at home?’
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