A shortened version of "What's up", which replaces greetings such as "Hello", "How are you?", "What's going on?", etc. This phrase was possibly
made popular in the 1940's from a cartoon called Bugs
Bunny, when the
rabbit said his famous catch phrase, "Eh...What's up, doc?".
If you are not a social recluse then you
will most likely be asked "Whatsup?" multiple times a day and be expected to answer with the vague "nothin", "not
shit", "chillin", etc.
Other ways to say whatsup:
How's it hanging?, How ya derrin?, How ya doin?, What ho, What it be?, What it do?, What it is?, What's clickin?, What's crackin'?, What's poppin?, What's new?, What gives?, What's cookin?, What's crackalackin?, What's happenin?, etc.