To be in a state of extreme happiness. Oh, I had a great time on my vacation—I totally blissed out while relaxing on a tropical island.
blissed (out)and blissed-out (blɪst...)
1. mod. in a state of emotional bliss. After the second movement, I was totally blissed out.
2. mod. alcohol or drug intoxicated. She is more than blissed. She is stoned.