As nouns the difference between beastie and breastie
is that beastie is (informal) beast, animal while breastie is (scotland) breast.
beastie
English
Noun
(
en noun)
(informal) beast, animal.
Coordinate terms
*critter
breastie
English
Noun
(
en noun)
(Scotland) breast
* 1785 ,
- Wee, sleekit, cow'rin, tim'rous beastie,
- O, what a panic's in thy breastie ?