Re: wriggle out of
I agree in the most part with SoothingDave but, in BrE, you can use it to mean "find some way out of a situation that you don't want to be in". Once you've arranged a date with someone, it's quite difficult to cancel without coming across as rude, especially if it's a first date. If I had agreed to go on a first date with someone but, the closer it came to the evening of the date, I started to think "What have I done? I really don't want to go on this date", I might start trying to think of some way to "wriggle out of it".
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