In a wider, more informal context, an allusion is a passing or casually short statement indicating broader meaning. It is an incidental mention of something, either directly or by implication, such as In the stock market he met his Waterloo..
The definition of a bump is a light jolt or a swollen, raised lump on the body. An example of a bump is the act of two toy cars hitting each other. An example of a bump is a welt on the hand. To bump is defined as to collide lightly. An example of to bump is for a car to knock gently into the back of another.
Bump sends contact information, photos and files to another device over the internet. Before activating the transfer, each user confirms what he or she wants to send to the other user. To initiate a transfer, two people physically bump their phones together.