What is Beav-schwanz?
1.
Taken literally, it is the merge of the two words Beaver and Schwanz.
Beaver, meaning "the pudenda of a woman"...and Schwanz meaning "male organ of copulation".
In an abstract way it could be like the Chinese dualistic philosophy of yin and yang.
This could be a way to describe a She-Male's private parts:
"Hey dude, check out his-her sexy Beav-Schwanz."
or
"This man-woman is suffering from Beav-Schwanz Envy"
Abstract Example:
"He/She's like my yin to my yang, my 6 to my 9, my Beav-Schwanz..."