1) Someone who while wakeboarding or waterskiing falls and forgets to let go of the rope. That person is therefore dragged behind the boat, literally sucking the wake.
2) a term for an extremely unintelligent person, incapable of making correct decisions
1) How much water do you think the suckwake swallowed that time? He still never lets go of the rope.
2) Dude, my buddy is such a suckwake! Last week he set himself on fire trying to smoke and siphon gasoline at the same time!