Those esthetically unpleasing small round sensors found on many automobile bumpers that provide an audible proximity warning when parking. They almost always look out of place and are not integrated into the overall design of the car and therefor look out of place and ugly... just like a zit on your face. Something you wish you could pop to have them go away and make the car more beautiful.
A time after a sports game or assembly at school where there are hundreds of people attempting to all leave through one exit causing a build up of people that slowly squeezes out of the building much like a zit.
Matt: Why do we have to have these stupid assemblies about Obama. he isn't doing anything special, he's just a president that happens to be black.
Marissa: I know but as horrible as it was, it was nothing compared to the human zit afterwards.
space in a crowded conversation were by you have a chance to add / burst in a comment that progressively opens out the conversation.
jack:her eye brow is so high
backround chuckie:lolololololololololol
jill:i kwn
jack:up/down
jill:you look worried
ginger:browser.....<<<<<<<<<<<<<<<there space spot/zit
backround chuckie:lolololololol
jill:lololololololololololol
jack:do you do birthday parties?
backround chuckie:lolololololol