Top Definition
Any form of manual genital manipulation that occurs prior to 10AM.
I woke up with morning wood but my girlfriend is on her period so I had to settle for a Breakfast Jack.

My folks left early this morning so I managed to get in a Breakfast Jack before school.
by Basil Hill February 15, 2009
2 more definitions
the act of masturbating as soon as one wakes up. often around breakfast time.
bill: yo what'd u do this morning?

scott: had a breakfastjack then went to work
by crack hagerman December 25, 2010
This morning treat is an excellent source of protein.
Bro: You ready for the gym this morning, Brah?

Brah: Yeah, I just had a huge breakfast jack, Bro.
by d kizzle February 25, 2009

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