The innate ability to accurately locate and urinate in a toilet while in near or complete darkness. Similar to a bat's sonar. Applicable only to men (and technically, women who can pee while standing up).
"Man I had to piss like a racehorse at 3 this morning, but I couldn't find the light switch. Luckily my peedar was working well last night."
by Jay In MIA July 13, 2012
A man’s ability in the middle of the night to know only by hearing if you’re actually peeing in the toilet, or all over the floor.
by Emo Flipper August 20, 2013