commonly used in any situation when the correct word does not immediately spring to mind. Has also been used as a word in it's own right when deemed appropriate. Often possible to understand a whole conversation with many "wassaname" substitutions.
when a nigga know they know but can’t remember it ( mostly used by people who in the hood or lived there ) but either way we know who you talking about
nigga 1 : yo did you see wasssname story on instagram?
Nigga 2 : hell yeah
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.