Ghost

ghost
Difficulty	12
Attacks	Touch 1d1

ghost
Difficulty	12
Attacks	Touch 1d1
Base level	10
Base experience	220
Speed	3
Base AC	-5
Base MR	50
Alignment	-5 (chaotic)
Frequency (by normal means)	Not randomly generated
Genocidable	No
Weight	1450
Nutritional value	0
Size	Medium
Resistances	Cold, Disintegration, Sleep, Poison, Stoning
Resistances conveyed	None
A ghost: can fly. can phase through walls. does not breathe. has a head, a couple of arms, and a torso. does not have a solid form. does not eat. (*) is not a valid polymorphable form. is undead. is normally generated hostile. can follow you to other levels. has infravision. never leaves a corpse.
Reference	monst.c#line2515

A ghost is a type of monster in NetHack. Ghosts are most likely to appear as copies of previous-dead players in bones files, complete with their whole object assortment, and the pet may be nearby (feral). A ghost's inventory will always have all-cursed objects.

Ghosts will also appear in graveyards and in haunted temples.

If you can't kill them fast via regular attack, try kicking them instead.