Texture simply refers to how the cards on the flop relate or coordinate with one another. A flop with a highly coordinated texture would be something like three straight cards or three flush cards. A flop with an uncoordinated texture will contain cards that have little or nothing to do with each other.

Highly Coordinated Texture:

Ah  Kh  Qh 

Moderately Coordinated Texture:

Ah  Kh  2c 

Uncoordinated Texture:

Ah  8c  4s 
Community content is available under CC-BY-SA unless otherwise noted.