A 'hot shoe' is the mount on top of a standard camera (http://a.img-dpreview.com/reviews/PanasonicFZ20/images/fz20_hotshoe.jpg) on to which a hammer-head flash can be connected. It's 'hot' because the metal plates in it send electrical signals back and forth from camera to flash and flash to camera.
Although it's not a common usage, a 'shoe' (i.e. not 'hot') mount may refer to a 'dead' version of this connector. These can be found more often on non-camera items on which a flash might be placed. In these cases the flash is often triggered through other means (e.g. cable, light slave etc.)
You mean the proximal point of attachment.
An attachment can be two things. One kind of attachment is something that can be added to a device, for instance a vacuum attachment tube. Attachment can also mean a special connection, as in "He had an attachment to his favorite horse".
flash in the pants
In personal computer terms, a "rack mount" describes a type of holding that the computer can be placed in. The computer in the rack can then be mounted onto a wall.
If by the attachment foot you mean the accessory shoe on top of the camera...these were first developed for accessory viewfinders and so had no electrical connections - the earliest 'hot shoe' I've seen was on a Ricoh 519 I owned - 1950's vintage. You can use any flash in one if you can synchronise it. This requires that the flash can be connected to the camera or shutter by a PC cable - they are simple and common. There will be a small round socket on the camera somewhere - on the lens assembly in old folding cameras. You then need an electronic flash unit that has it's own socket or in some cases, a built in PC cable. Attach it, plug it in, turn it on. I'd recommend an 'auto' type as it'll make its own decisions about exposure.
Insertion is the attachment on the bone that moves
Emotional attachment is when you are very close with someone because of your feelings. A mother has an emotional attachment to her children because she loves them. Love is an emotion (a feeling) and an emotional attachment is based on that feelings.
Needs clarification. Do you mean the flash player or flash software?
It's not an idiom, it's a computer direction. "Opening" an attachment means clicking on the link and causing the attachment to upload to your computer.
Serial Advanced Technology Attachment Not sure in which context you mean but the normal meaning of SATA is Serial ATA which is the type of transfer architeture inside the PC from the motherboard to the Hard drive. It is a newer faster information transfer type which will make PC run faster and transfer information internally faster in the future.
advanced technology attachment.
It refers to attachment of hydrogen and carbon