1. To steal a penguin

2. To sexually abuse a penguin

3. To steal a penguin from it's owner/family from right in front of them and watching them frantically search about while you almost die from hysterical laughter

4. Whatever you think it means
1. "Hey! You jacked my penguin!"

2. "Ew! He's jacking a penguin"

3. Person 1 "Hey where's my penguin gone?!?!? Gah! Someone Jacked it!!"

Person 2 "lol"

4. "He's jacking a penguin? Ew..."
by Forbidden Otter December 4, 2008
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Something EXTREMELY, messed up.
Something that is so messed up that it deserves to have a ridiculous description.
That car is jacked up.... like a jacked up, jacked up penguin!
by Sterling1235 June 14, 2016
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