- fierce; cruel; savagely brutal.
- brutally harsh; vitriolic; scathing.
- aggressively hostile; belligerent.
c.1540, from L. truculentus "fierce, savage," from trux (gen. trucis) "fierce, wild." (http://dictionary.reference.com/browse/truculent)
"Few acts these days make a show of shunning commercial success, perhaps because, after a decade of turmoil, the corporate-pop monolith no longer seems so monolithic. Lady Gaga blazed a trail for truculent pop stars by treating her own celebrity as an evolving art project."
- Kelefa Sanneh, "Pop for misfits: Can a former noise musician become a star?", 28 September 2015 The New Yorker (http://www.newyorker.com/magazine/2015/09/28/pop-for-misfits)