A street side parking space that has enough room in advance of the intended spot, so that one can simply glide into the space, without the necessity of parallel parking or jumping the curb (not good for vehicles with CV joints, but done regularly, nevertheless). The more vacant spots in advance of the target spot, the better.
Stoners, the morbidly obese and people over 50, will cruise endlessly for glide in spots. It is rumored that the last glide in parking space in Manhattan was spotted sometime around 1935.
And for the really serious parker, there is the Super Glide In. (Which is a Glide In combined with a Glide Out.)