A person having minimal motivation.
A person who never takes the initiative to complete a task.
This person is all around lazy.
This person is considered to be a burden on society.
What exactly have you done all day long, you schlup?!?!
And you didn't do anything about that?!?-You Schlup!
The sound made if one was to to place one's hands behind a girls head during sex and when she's least execting it, just go a head and just whack it in her mouth. This should create the pleasant "schlup" sound.
Oh thats good, oh right there, mmm, oh where are you going, where do you want me...*schlup*...mmm, mmufffrrrlfff mm, glaaaarbbmuurgmmmblle...Gasp.