rant 
(rănt)
(rănt)v. rant·ed, rant·ing, rants
v.intr.
1. To speak or write in an angry or emotionally charged manner; rave.
2. To express at length a complaint or negative opinion: "He could rant on the subject of physician-assisted illness" (Paul Theroux).
v.tr.
To utter or express by ranting: "Adams's fellow Federalists ranted that he was mentally unfit to be president" (Susan Dunn).
n.
1. Angry, emotionally charged, or tediously negative speech or writing: a speech that was more rant than reason.
2. An example of such speech or writing: a rant against the university's policies.
3. Chiefly British Wild or uproarious merriment.
[Probably from obsolete Dutch ranten.]
ranter n.