roughneck

Short definition from Wiktionary

Noun

1. 1
   Someone with rough manners; a rowdy or uncouth person.
2. 2
   An ironworker; a dirty or low-paid worker, a labourer.
3. 3
   A labourer on an oil rig.

Verb

1. 1
   To work as a laborer on an oil rig.