1) Anger 2) Short hair, to Burns 
Birse (Braois/Breis) is a parish in the Lower Deeside area of Aberdeenshire, Scotland, which includes the communities of Finzean and Ballogie. However the name Birse is often used to refer only to the northwestern part of the parish which lies on the south side of the River Dee, Aberdeenshire, opposite the village of Aboyne. The south-west part of...
• (n.) A bristle or bristles.
Birse noun A bristle or bristles. [ Scot.]
a short hair of the beard or body; a bristle. · anger; rage.