enjoy oneself = have a good time, have fun. この言い方は色々と解釈が可能。
1:12 thank you for coming. now, let's enjoy ourselves. 次世代戦闘機のF-40 のお披露目にご参加有難うございます。では、軽食を用意しましたので、召し上がってください。
Madam Secretary 5x12 Sneak Peek 1 "Strategic Ambiguity"
1:08 we haven't got all day. they're kicking us out at two o'clock. so why don't we just kick back and enjoy ourselves. 二時には追い出されるから、ぐずぐずせず、リラックスして今を楽しもうじゃないか。
Here's What REALLY Happened | Monk
0:01 it's rolling around, having fun, enjoying itself. that's what it looks like to me anyway. クジラは泳ぎながら回転して、楽しんでいる様子です。私にはそう見えますね。
Playful whale has fun in the sun