biv�ou�ac ( P ) Pronunciation Key (bv-k, bvwk)
n.
A temporary encampment often in an unsheltered area.

intr.v. biv�ou�acked, biv�ou�ack�ing, biv�ou�acs, also biv�ou�acks
To camp in a bivouac.

re: Did "Mr Lewis made it up using poetic licence!"

In his day, you didn't even need a camping licence to bivouac.