What does it mean when you wipe blood from your butt when you go poop?

There can be various causes of this ranging from harmless to fatal.

a simple list would include possibility of:

anal fissures

hemorrhoids

diarrhea

colorectal cancer

polyps

blood from menses that is mistaken for anal bleeding

as you can see, there are many possiblities. You should contact your doctor to rule out any serious condition if you experience this.