shwumpy
Rough, uneven, or cracked pavement or other type of ground. Something that would not be desirable to travel over with small wheels such as those of a skateboard.
I don't think I can roll through this way, the sidewalk's all shwumpy!
Shwumpy-lumpy
Alternate wording for the male genitalia.
Dang, dude, she really wanted that shwumpy-lumpy last night.