Function: intransitive verb
Date: 1579
1 : EXPLODE
2 : to burst forth or break out suddenly or noisily
3 : to go forth, out, or away : LEAVE
4 : to undergo decline or deterioration
5 : to follow the expected or desired course : PROCEED <the party went off well>
6 : to make a characteristic noise : SOUND <could hear the alarm going off >
– go off the deep end
1 : to enter recklessly on a course
2 : to become very much excited