* Pagtatambal: This means "pairing" or "combining."
* Tambol: This is a less common word, but it likely means something like "drumming" or "beating."
Therefore, "pagtatambal-tambal" could potentially mean:
* Pairing/combining things in a rhythmic or repetitive way.
* Matching things up in a haphazard or random way.
* Creating a musical or rhythmic combination.
However, without further context, it's hard to give a precise definition.
It's possible this phrase is a colloquialism or slang expression in a particular region or community. If you have more context about where you heard it, that would be helpful in understanding the meaning.