No.
In an ordinary deck of cards here are four of every denomination -- one in every suit (one in hearts, one in spades, etc.) There are four aces, four two's, four tens, four jacks and on and on.
Jacks are for lifting or raising things. They can be screwed jacks or air jacks, or most commonly, hydraulic jacks.
Dried up crispy card and favoring, like every other cereal.
jacks reaction to what?
Hungry Jacks is at Livingston , Bussleten
Harry Jacks died in 1994.
Ron Jacks was born in 1948.
Digby Jacks was born in 1945.
Digby Jacks died in 2011.
Sam Jacks died in 1975.
Ball Jacks happened in 1993.
Al Jacks was born in 1935.