Burly

• (a.) Coarse and rough; boisterous. • (a.) Having a large, strong, or gross body; stout; lusty; -- now used chiefly of human beings, but formerly of animals, in the sense of stately or beautiful, and of inanimate things that were huge and bulky.
Found on http://thinkexist.com/dictionary/meaning/burly/

Burly

Bur'ly (bûr'lȳ) adjective [ Middle English burlich strong, excellent; perhaps orig. fit for a lady's bower, hence handsome, manly, stout. Confer Bower .] 1. Having a large, strong, or gross body; stout; lusty; -- now used chiefly of human beings, but formerly of animals, in ...
Found on http://www.encyclo.co.uk/webster/B/115

Burly

Burly is American slang for something difficult.
Found on http://www.probertencyclopaedia.com/browse/ZBA.HTM
No exact match found