boo 1
/booh/ , interj., n., pl. boos , v. , booed, booing .
interj.
1. (used to express contempt or disapprobation or to startle or frighten).
n.
2. an exclamation of contempt or disapproval: a loud boo from the bleachers.
v.i.
3. to cry boo in derision.
v.t.
4. to show disapproval of by booing.
[ 1810-20; expressive formation ]
boo 2
/booh, boh/ , n.
Slang. marijuana. Also called boo grass .
[ 1955-60; of uncert. orig. ]