Green’s Dictionary of Slang

beak v.1

[like a bird, the beggar ‘pecks around’]

to beg; thus beaking adj.

[UK]Misogonus in Farmer (1906) II iv: Welcome, Sir John! now sure, he’s a beaking priest.
[UK]Rowlands Martin Mark-all 39: What maund doe you beake, what kind of begging vse you?