A cover up tattoo is a type of body modification that involves replacing an existing tattoo with a new one. The aim of a cover up tattoo is to make the original tattoo less visible, or to completely cover it up with a new design. This type of tattoo is popular among people who are looking to change or hide their existing tattoos. Cover up tattoos require more skill and artistry than traditional tattoos, as the artist must take into account the existing tattoo and use their creative abilities to create something that will blend the existing design into the new one.