tip-on
n.— «Bell Atlantic, which merged with GTE to form Verizon last summer, began offering what Verizon Information Services calls a “magnetic tip-on” on the front cover of the phone book about a year and a half ago, according to spokeswoman Heidi Jaquish.» —“Phone book advertisers reach out in new ways” by Lee Hammel Worcester Telegram & Gazette Apr. 6, 2001. (source: Double-Tongued Dictionary)