The echolocation tool men use when they piss in the dark to make sure they're hitting the toilet. This involves starting to urinate and listening carefully for the sound of the urine stream hitting the toilet water. If the sound is not heard, aiming adjustments are made until such time as the reassuring sound is heard.

An imaginary device that allows a person to recognize when another person has a boner--or has recently seen an attractive person.

Usually held by guys when with other guys. A constant beeping sound is a classic sign of someone's bonar sonar being activated.

Note: The bonar sonar tells when other people have a boner, not yourself. So if person A has a boner, person B would be notified by his bonar sonar.

Whilst giving birth to an almighty stool, it enters the water of the toilet bowl and the integrity of the turd is maintained (no snap) until the bowel is evacuated. This is due to the consistancy of the log which is most likely made up of digested pork ribs with a mallasess based sauce and a pint or three of Guinness. An important phenomena is also at play, when the nard enters the water, the submerged portion of the cable becomes weightless which enables the turd to continue and reach maximum length. The cable must be maintained within a certain angle (8.5 degrees) in order to avoid cert snap.
This act resembles the use of a Dipping Sonar Array employed by Naval Anti Submarine Helicopters.

A boner capable of detecting nearby genitalia via a method of clacking ball sounds.

When it feels like you gotta Shit and you go to the Toilet and you try to let the poop out of your ass but it won’t come out because the food is still getting digested

When a man's dick responds to daddy or sense someone calling them daddy & moves to the person.

while in the midst of giving a slutty girl a blowjob you proceed to ream your cock down her throat, as your cock goes deeper you will hear her gag quicker and quicker the deeper you go. similar to the sonar effect.