A treble stitch. Assuming this is an American pattern, yoh twice, insert hook into next stitch, yoh and pull through stitch, yoh and pull through 2 loops on hook, yoh and pull through next 2 loops on hook, yoh and pull through remaining 2 loops on hook.
It means triple crochet.
Yarn Over.
Slip Stitch
Probably "spaces". As in skip spaces.
I believe it means trail.
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.
My grandmother loves crocheting.
Travel
Snot
It means decrease, usually by crocheting stitches together.
The meaning of TR on a bank account is asset based financing.