Top definition
A Headlong is a male codeword used to signal other males when one sees a sexy woman's thong as she bends over, or just walks by.
1) Hey man! check out that fine headlong that just passed us
2) You totally missed out, Liz just had the best Headlong moment.
2) You totally missed out, Liz just had the best Headlong moment.
by Mark Twain's booty May 14, 2011