1. in senses of verbal or physical harassment [despite chronology, presumably link to rag n.1 (3b); ? abbr. bullyrag v.] .
(a) [mid-18C+] to scold, to talk severely to.
(b) [19C+] (also rag on) to annoy, to tease (esp. in context of school or university).
(c) [20C+] to attack, to cause trouble; in context, to rob.
(d) [1900s] (US campus) to talk nonsense.
(e) [1910s] to fight, to beat up; to manhandle.
(f) [1910s] (UK juv.) to create disorder.
(g) [1910s] to argue over a topic, to wrangle.
(h) [1970s] (US) to gossip.
(i) [1970s+] to complain.
(j) [2000s] to question closely, to interrogate.
2. [mid-19C] to share, esp. to divide up the proceeds of a crime; thus go rags, to share out [? SE rag, to tear in pieces].
3. with ref. to menstruation.
(a) [1960s+] to menstruate.
(b) [1970s+] to be irritable.
4. [1990s+] (US black) to dress (fashionably).
[mid-19C] (UK Und.) underworld cant.
1. [1980s+] (US) to nag, to criticize.
2. see sense 1b above.
[1980s] to abuse verbally.
[2000s] to threaten; thus n. rag-talk, a whining plea.