Green’s Dictionary of Slang

burster n.1

also buster
[SE burst]

1. [19C] a loaf of bread; thus as twopenny burster, a twopenny loaf [i.e. it fills one’s stomach].

2. [mid-19C] (orig. boxing) a heavy fall that could end a fight [one ‘bursts’ oneself].

3. a heavy blow from the fist.

4. [mid-19C] an exhausting physical effort.

5. [mid-19C] (UK Und.) a burglar [bust v.1 (1a)].

6. [mid–late 19C] a fall from a horse; thus come a burster, to fall from one’s horse [one ‘bursts’ oneself].

7. [1900s] (Aus.) ‘a cropper’, in fig. uses.

8. see buster n.1 (1d)