especially: to have or do too much of something that one enjoys or desires
… probably enjoyed drinking and likely overindulged on occasion … Corey Andrews
Other studies are shedding light not just on why modern humans occasionally eat too much, but why, when we do overindulge, we often choose foods that aren't the best for us. Paul Raeburn
Doctors who know better still overindulge in sweets … Nick Romeo
Occasionally … overindulges in long reminiscences of sports and school days … Helen Benedict