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1.
when a male tug and pulls on his attachment until thick, oozy liquid comes shooting out of the sometimes small part of a males body. But if your names Jonny, said attachment is huge.
Damn dude, i just finished jackin off, now i feel so relaxed and ready for the day.
by Kevin Nunez January 02, 2012
 
2.
The act of consuming, the always delicious, apple jacks cereal.
Matty G: "Yo dude, watcha doin"?

Joe: "You know, just jackin' off or whatever".
by Pirate Suite April 17, 2007