Slip Stitch
I would say most likely that means "slip stitch."
Yarn Over.
Probably "spaces". As in skip spaces.
How am I supposed to know I’m asking the question here
yrn is the abbreviation for 'yarn' - the material you are knitting or crocheting with
Usually, rem would mean "remaining", as in, "for all remaining stitches" etc.
The 'SS' in 'SS Maheno' stands for 'Steamship'.
My grandmother loves crocheting.
It means decrease, usually by crocheting stitches together.
The SS in 'SS Great Britain' stands for 'Steamship'.
When a pattern refers to the "right side" of your work, they mean the side that is the front. The side that is the back will be the "wrong" side.