Syntax 1: cancel()
Cancels any delayed functions linked to the game object invoking the cancel that have no tag set.

Syntax 2: cancel("*")
Cancels any and all delayed functions linked to the game object invoking the cancel.

Syntax 3: cancel(tag[string])
Cancels any delayed functions linked to the game object invoking the cancel whose tag matches the tag argument.

Example1:

functiondo_stuff()
goto(31404)
mdo("dance")
goto(10204)
end

delay(10,do_stuff)
cancel() – do_stuff will never run

Example2:

functiondo_stuff()
goto(31404)
mdo("dance")
goto(10204)
end

delay(10,do_stuff, "stuff") – Give the delay a "stuff" tag so we can target it with cancel
cancel("*") – cancel all delays no matter what

Example3:

functiondo_stuff()
goto(31404)
mdo("dance")
goto(10204)
end

delay(10,do_stuff, "stuff") – Give the delay a "stuff" tag so we can target it with cancel
cancel("stuff") – do_stuff will never run

See delay