Which has the opposite meaning of ‘meticulous’?

Meticulous (Adjective)
Meaning: Showing great attention to detail; very careful and precise.
Synonyms: careful, conscientious, diligent, ultra-careful, scrupulous, punctilious, painstaking.
Near Antonyms for meticulous: cursory, halfhearted, heedless, inattentive, incautious, mindless, regardless.

Source: Oxford Dictionary, Merriam - Webster Dictionary