spreading or stretching in a loose, uncontrolled, or unorganized way

to sprawl:

1. To sit or lie with limbs spread out carelessly or awkwardly He sprawled on the sofa watching TV.
   He was lying or sitting in a relaxed, untidy posture.
2. To spread out irregularly or over a large area The city sprawled across the valley.
   The city expanded without clear order or planning.

sprawl (noun):

A sprawling position or movement She fell in a sprawl on the floor.

1. Uncontrolled expansion, especially of urban areas Urban sprawl is destroying the countryside.
   “Urban sprawl” refers to cities growing outwards in an unplanned, often messy way — with low-density housing, shopping malls, highways, etc.