The Collaborative International Dictionary of English v.0.48:

Booly \Boo"ly\, n.; pl. Boolies. [Ir. buachail cowherd; bo cow
   + giolla boy.]
   A company of Irish herdsmen, or a single herdsman, wandering
   from place to place with flocks and herds, and living on
   their milk, like the Tartars; also, a place in the mountain
   pastures inclosed for the shelter of cattle or their keepers.
   [Obs.] [Written also boley, bolye, bouillie.]
   --Spenser.
   [1913 Webster]