(British)

As a verb: To bivouac, make camp. A shortening used by scouts and the armed forces in the 1970s and 1980s.

As a noun:

1a. A bivouac, camping place

1b. A tent, especially a small tent. Both terms are, predictably, part of the vocab- ulary of soldiers, scouts, campers and ramblers, etc.

2. An alternative form of bevvy.