let yourself go
US /lɛt jərˈsɛlf ɡoʊ/
UK /lɛt jərˈsɛlf ɡoʊ/

1.
lasciarsi andare, trascurarsi
to become less careful about your appearance or health
:
•
After he retired, he really let himself go and gained a lot of weight.
Dopo essere andato in pensione, si è davvero lasciato andare e ha preso molto peso.
•
She used to be so stylish, but lately, she's really let herself go.
Era così elegante, ma ultimamente si è davvero lasciata andare.
2.
lasciarsi andare, rilassarsi
to allow yourself to relax completely and enjoy something
:
•
The music was so good, I just had to let myself go and dance.
La musica era così bella, dovevo solo lasciarmi andare e ballare.
•
It's important to sometimes let yourself go and enjoy the moment.
È importante a volte lasciarsi andare e godersi il momento.