Come by anytime.随时来串门啊。

这是一句客套话~~老外还是很注重家庭 个人隐私的，没有受到邀请，最好不要擅自去

例句：

1.Come by for a drink after work.

下班后来我家喝一杯。

2.Warm professionals were not easy to come by.

热心的内行是不容易碰上的。