"anything of little use or value," 1518, perhaps from a Scand. source (cf. O.N. tros "rubbish, fallen leaves and twigs," Norw. dial. trask "lumber, trash, baggage," Swed. trasa "rags, tatters"), of unknown origin. Applied to ill-bred persons or groups from 1604 ("Othello"). Applied to domestic refuse or garbage in 1906 (Amer.Eng.). The verb meaning "to discard as worthless" is 1895, from the noun; in the sense of "destroy, vandalize" it is attested from 1970; extended to "criticize severely" in 1975. Trashy "worthless" first attested 1620.
A despicable, ill-bred person or group: Don't mind them, they're just trash(1604+)
To vandalize; mutilate or destroy, sometimes as an act of political protest; waste: They have also made it a practice to ''trash'' (wreck) restaurants, publishing houses, and other businesses that discriminate against the third world of sex/ One year we were trashed three times(1970+)
To vilify; excoriate; bad-mouth, dump on: the other mayoralty that Koch likes to trash whenever he gets the chance/ Much given to the rave-pan approach to her craft, she can trash in a flash(1975+)
To scavenge discarded furniture and other items that have been thrown away (1960s+)