Wouldn't it mean that one is gay/homosexual? This meaning that they are clearly NOT "straight" (the frequently used word for heterosexual), because a roundabout (also called a rotary in some areas) is, obviously, NOT straight, but curved.
About as straight as a roundabout
as straight as Lewis downtons mum
yeh there as straight as a roundabout =]
A driver must always look to the left and yield to a vehicle that is already in the roundabout.
Cars in the roundabout have the right of way over cars entering the roundabout.
The junction is controlled by a roundabout.
The Magic Roundabout was created in 1964.
The Magic Roundabout ended in 1971.
Operation Roundabout happened in 1943.
Rhondda Roundabout was created in 1934.
Roundabout is spelled as one word when referring to circular intersections on streets.
A bicycle roundabout is a roundabout intended for bicycles, typically used in order to improve the flow of automobile transport.