In England it means "nothing" or none, as in "Hey, do you have some spare change?" answer "I am sorry, I have nowt to give you."
Other English speakers may use "naught" (nothing, zero) in the same context.
Yes, "nowt" is slang for "nothing".
nowt
Nowt.
Nowt
DOUBT
Nowt.
by doing nowt you silly sausage!
nowt egg
He is gay, nowt wrong with that!
Hear all, see all and say nowt, ate all, sup all and pay nowt and if tha wants owt doing do it for thysen. Yorkshire position on wise action, careful and non wasteful use of resources and Independence.
nowt egg
nowt coz he ent got any