Meaning your mother is your father in turn insinuating your mother is of the male gender.
In an argumentative situation: "Shut it ye bam! Yer ma's yer da!"
by Charlene Walshe April 15, 2006
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yer ma means your mother or mom or whatever you want it to be. I live in Scotland and these neds use this phrase to insult your female parent. They also use this phrase when talking to one another.
'whaaaaayyy yer ma has nae titties'
'is yer ma orite with us crashin at ur hoose'
by Matt January 4, 2004
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This is an extreme insult, deriving from Northern Ireland, hence the spelling to emulate local dialects. It is in common use as a put down. It is accompanied by two or more fingers held together, as if inserting into an orifice, and waved under the victim's nose. It reflects the harshness and vulgarity common to N. Irish conversation.
Have you been done for University-wide corruption again, boss?

Smell yer ma, ye wee shite.
by docrob September 15, 2009
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variation of the common insult "your mom" or "yo mamma." this variation is one of the rednecks. introduced to society by harrison.
Harrison: yeeehaw! i rode dem horses harrrrrrd last night!

Victim: YER MA!
by ZREDNECKWEE January 14, 2009
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the ultimate comeback for the typical slag-fest
Person one: "Aye, yer ma"
Person two: "Aye, yer face"
Person one: "Aye, yer ma's face!"

Quality...
by Turtle Genius December 31, 2010
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yer ma is a come back to crappy english ned's tryin to slag u off
ur a fuckin gay boy ... a weel sos yer ma
by Aaroon baxt March 11, 2004
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