From Longman Dictionary of Contemporary Englishcompulsive overeater/gambler/spender/liar etccompulsive overeater/gambler/spender/liar etcCONTROLsomeone who has such a strong desire to eat too much etc that they are unable to control it a help group for compulsive overeaters → compulsive
Examples from the Corpus
compulsive overeater/gambler/spender/liar etc• Most compulsive gamblers are not hugely successful.• I imagine compulsive gamblers get started this way.• Mel is a compulsive liar too, but I guess Steve is too self-obsessed to care.• Characters are apparently motiveless, compulsive liars, who shy from eye contact. 