Real Dictionary

blip
countable noun: A blip in a situation is a sudden but temporary change or interruption in it.
countable noun: A blip in a straight line, such as the line on a graph, is a point at which the line suddenly makes a sharp change of direction before returning to its original direction.
countable noun: A blip is a small spot of light, sometimes occurring with a short, high-pitched sound, which flashes on and off regularly on a piece of equipment such as a radar screen.

blip in American English
a luminous image on an oscilloscope, as one on a radar screen showing the location of an aircraft, ship, etc.
bleep
to make a blip or series of blips
intransitive verb: to move or proceed in short, irregular, jerking movements
noun: a spot of light on a radar screen indicating the position of a plane, submarine, or other object
transitive verb

blip in British English
noun: a repetitive sound, such as that produced by an electronic device, by dripping water, etc
verb: to produce such a noise