A compound bend is a bended note which requires two or more notes to resolve. I'm not sure what this exactly means, I read it in a guitar magazine.

I would assume that these would qualify as compound bends, and they're very common blues licks:


-------------12-----------------12--15--
---------12--------------15b17----------
---14b16--------------------------------
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I'm sure asking this under the theory question would result in a more informed response than mine, but I hope this helps.