Examples:

• Yeah. Any special place I can drop a line?
• Any special place I can drop a line?
• I'll drop a line to some of the bigwigs next week.
• He's got a role to play and he mustn't drop a line.
• Drop a line! Subscribe to all posts by daily email or through a feed reader.
• You could sometimes drop a line.
• Feel free to drop a line if you ever need anything... Or even if you just want to hang out.
• Just wanted to drop a line and thank all who have worked to make OpenBSD such a clean, cool, & efficient project.
• Sort out the paperwork within two weeks or I tell her everything and I might just drop a line to your head of chambers as well.