how's your father

Definitions

1. A whatsit; a thing which the speaker is unable or unwilling to specify more precisely.
   British, countable, slang
2. Sexual intercourse.
   British, euphemistic, slang, uncountable

Examples

“And meanwhile at the station, there's a couple of likely lads Who swear⟳ like⟳ how's your father, and they're very cool for cats.”

“I popped round Mary's for a bit of how's your father.”

“I mean⟳ what a buzz, man, me four fans, an’ I'm on the fookin’ telly! They love⟳ it! So suddenly it's knickers off and ’ow's your father.”

CEFR level