To accompany someone, esp when not invited: If you don't mind, I'll just tag along with you/ Which I can do on my own, or whatever; you want to tag along (1900+)
You read it to tag along with hardboiled detective Philip Marlowe.
We were always little vagabonds going along with them to Vegas and Billie has never been made to tag along on jobs.
I'd somehow persuaded Florida State University to let me tag along on their summer abroad program.
When her friends would go to the movies, Nadia had to fib about her whereabouts in order to tag along.
Miyazaki is frank in his interviews with Sunada, whom he allows to tag along to his studio, his garden, and his private atelier.
But he could wait here, or he could tag along and see what happened.
If they "wanted to tag along clear to the Ship woods," he did not care.
Jack wont stay there alone, I know, so hes likely to tag along.
She's a good deal better off than if you let her tag along behind.
Sometimes Jerry did not mind having Andy tag along as much as he made out.