A really fat child or grown man that looks like either egg shaped or like a ball

After humping a chick you dump her as fast as possible.

See "one-nighter"

(noun) (plural form: humpty dumpties)

1) Tasty potato chips
2) An egg whitewashed on the outside, but rotten on the inside. You can tell it's rotten when it floats on the water.
3) A libertine who feigns true love, only to "hump" you and then "dump" you in the end.

Typically a fat person who waddles when they walk.

When, to your surprise, you go to pee in a wall urinal and you find a load of shit just sitting there clogging the path of the piss. It is the nemesis of every janitor.

Having sex with a person and the discarding them in the most expedient manner.

When an obese person puts on skinny jeans and is magically turned egg shaped with stick-like legs.