not up to scratch. similar to slap dash.

to complete a task in a sloppy, quick, or otherwise very poor fashion, especially of home services/trades people, but can also be a scathing criticism of the standard of work in any task.
"This book is truly awful, especially Jack's anticlimactic slash dab ending."
by Paul Kumnick January 20, 2006
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Easy way to explain forward slash vs back slash to end users.

Left dab slash = "/"

Right dab slash = "\"

When you dab to the left, your arms look like a forward slash. When you dab to the right, your arms look like a backslash.
"Go to: chrome, colon, left dab slash, left dab slash settings"
by CWTSR October 2, 2020
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