jibhead
nounEtymology From jib + head.
- An improvement over the arcwaller, this machine is designed for giving a shear cut in any plane in addition to the horizontal cut, with a view to reduce the amount of blasting and to get better size-consist of the broken coal. It is used for rapid advance of headings. It has four units: a gearhead, a motor housing, a main jibhead, and an eccentric jibhead. The cutting head is mounted eccentrically on the main jibhead and the two are capable of complete rotational movement independently or […]1966, Boris Mikhaĭlovich Vorobév, Ramrao T. Deshmukh, Advanced Coal Mining, volume 1, Asia Publishing House, →LCCN, →OCLC, page 449:
- For instance there can be no disputes nor discourses about the superiority of the jibhead sail plan with its permanent backstay over the old fashioned gaff-head main sail.1950 January 23, MotorBoating, →ISSN Invalid ISSN, page 101:
3
Slang A user of jib (crystal methamphetamine); a methhead.
- ‘[…]Every jibhead from here to Timbuktu’s gonna want a taste.’2018, Brian Gibson, “Romancing the ice: The problematic poetry of Breaking Bad”, in Critical Studies in Television, volume 13, number 4, SAGE Publications Sage UK: London, England, →ISSN, pages 405–421: