When wearing only a T shirt and nothing else letting the your meat dangle out from the bottom of the shirt. Women can also perform this maneuver.
On Billy's day off, he walked around the house shirt cockin and playing video games all day letting his massive hog breathe
by Knucklesmcjerk October 20, 2023
Get the Shirt cockin mug.A signature shirt or sig shirt or SS is a shirt that a person in a picture wears usually on purpose. This is sometimes a person's ow custom shirt but mostly it's not. These are usually validated by a myspace whore or a just a man/woman looking for a hot date. sometimes it cld be just a bikini top (hopefully only for a girl)
by Hellhound9210 June 23, 2009
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