Chèn dàjiā bù zhùyì, tā qiāoqiāo liū zhī dà jí le.
Taking advantage of no one watching, he quietly snuck away.
Tips
memory
溜 means to sneak or slide; 大吉 means great luck or good fortune. The humorous idea: slipping away is your best 'lucky' move. Imagine someone gleefully sliding out the back door, congratulating themselves.
