go off

verb
RareNot in standard dictionaries
1

To explode.

2

To fire, especially accidentally.

3

To explode metaphorically; to become very angry or overexcited.

4

To begin clanging or making noise.

5

To stop operating; to switch off.

6

To depart; to leave.

7

To putrefy or become inedible, or to become unusable in any way.

8

To like gradually less.

9

To cure; to set.

10

To pass off; to take place; to be accomplished; to happen.

#archaic#slang