Porch Spam 

Unsolicited junk mail flyers and adverts that litter your doorstep.

"I'm stepping out to get a burrito - cya in a bit."

<opens front door, triggering a rain of glossy cardstock all over the porch>

"Aw man, fucking porch spammers!"

Porch Spam by captain manly December 5, 2012

porchslam 

When your friend (usually of Italian heritage) has impromptu sex on a porch. A bone sesh on any porch, balcony, or patio where you end up having sex on the furniture, railings, or the ground.

Holy crap, that Italian girl totally took me up on a porchslam last night. Score, dude!

porchslam by Dr. Definitionz November 14, 2010