drop into
phrasal verbdrop by/in | drop in on somebody | drop into something  
(British English also drop round)
- to pay an informal visit to a person or a place顺便访问;顺便进入 - Drop by sometime.有空儿来坐坐。 
- I thought I'd drop in on you while I was passing.我曾想路过时顺便来看看你。 
- Sorry we're late—we dropped into the pub on the way.对不起,我们迟到了。我们半路上顺便到酒馆坐了坐。 
 
- Drop by sometime.