To admit to someone you were wrong and apologize and blah blah.. basically kiss their ass until they forgive you.
"My ex tried to come crawling back to me last night... whatever!"
by nooneactuallycares May 16, 2018
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You’ll walk over; but, you’ll crawl back! — a variation of You’ll walk over; but, you’ll limp back! Spoken as a prelude to the promise of a good fight; or, overly vigorous multi-position highly active sex — though not at the same time.

Neither of these are possible for the current generation of men who are still virgins at 28; and, keyboard warriors only at best!!! But, that’s another Urban Dictionary entry.
An extreme athlete just who spent 500 days in a cave and recently came out told her lover:

You can try to have sex with me if you want to; but, I’ve been in a cave for 500 days; You’ll walk over; but, you’ll crawl back!
by Mind Hunter the Profiler April 24, 2023
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A line of flavor text when fighting Sans that might pop up, the protagonist is described as 'feeling their sins crawling down their back'.

Other words can be transplanted into it.
Undertale
You felt your sins crawling down your back (Original)
You felt a girl crawling down your back
you felt ___ crawling down your back
by Shalax February 27, 2016
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