I bet for many not having squash would be a delight. I for one always enjoy a nice helping of most any variety of the tasty gourd. The word squash also has non gastronomic meanings. For example the racket game. Not sure how they came up with the that one. I think the most common connotation would have to be to compress, for instance, squashed like a bug. As a home inspector, I prefer not to find building components squashed.
Houses, to somewhat over simplify, are built of wood sticks stacked and nailed together. In more recent years the "sticks" have changed from wood cut directly from trees, known as dimensional lumber, to engineered wood products. Trusses or engineered joists are quite common in newer construction. Trusses and engineered wood products require in many instances non traditional or modified methods of installation.
One basic element that almost without exception must be installed with engineered "I" joists is squash blocks. No they are not cubes made from zucchini. Squash blocks are pieces of wood, usually 2 x 4s, placed directly next to the I joists at a load bearing point. Most often atop a main carrying beam. The purpose of the squash blocks is to prevent the web (the wood in the center) of the joist from buckling and failing under load.
While inspecting a newer house recently, I noticed the builder had used engineered wood for the main floor framing. Like I said, not uncommon to find in newer construction. Checking the joists at the main beam, conspicuous in their absence, at least to me, were squash blocks.
Now it is possible the architect may have specified some of the floor joists with out blocks because of the open wall between the living and dining rooms. What I'm sure of however, is that blocks would need to be present at the load bearing points, especially with large openings in the walls above. Not one piece of squash, I mean wood could be found along the entire length of the beam.
Without the blocks, the house could end up squishy, squashy.