0 a children's bicycle designed to attach to the back of an adult's bicycle -- (裝在成人腳踏車後面的)後掛型兒童腳踏車
1 someone who goes somewhere or does something with another person or other people, especially when they has not been invited -- (尤指不受歡迎的)追隨者,跟班,跟屁蟲
He looked over his shoulder at the tagalong and shouted, "You OK, Max?"
My husband can connect the tagalong and trailer to his bike to get the kids home.
Katie is the tagalong who refuses to be ignored or excluded.
Unimpressed by the prospect of a teenage tagalong, the cyclists promply leave him behind at mile 2.