It may have slipped out of my pocket during the performance.

它可能是在演出时从我的口袋里滑出来的。

youdao

The fish slipped out of my hand.

鱼从我手里溜掉了。

《牛津词典》

She slipped out of bed and tiptoed to the window.

她溜下床，踮起脚尖走向窗户。

《柯林斯英汉双解大词典》

Now one of its critics, a hero among online activists, has slipped out of their grasp.

BBC: Bahraini blogger Ali Abdulemam flees to UK

But by the first quarter it had slipped out of the top 5, replaced by Microsoft.

WSJ: B&N to add Google Play app store to its Nook HD

And with results going against County they slipped out of the Nationwide South play-off zone.

BBC: SPORT | Football | Non League | County loss ends play-off hopes