A comeback. Usually
the last resort in an argument, but sometimes the first if you
can't be bothered with an argument or conversation. Normally short for "I had
your maw" (meaning "I had sexual intercourse with your mother")
'That's shite.'
'So's yer maw.'
'You
owe me.'
'Yeah, well
your maw owes me for last night.'
'You're such a gay.'
'I think your maw would disagree.'
'Fuck you.'
'Shit, watch out. Here comes your maw,
an' it looks like she's got an erection.'