Leek is a vegetable. But, the first time I've seen "Leeking" was in a text message. I didn't, back then, know its meaning. So, after some research I found "Leeking" is a typo/auto correct for "Lurking" and it referred to and accepted for someone who's been lurking around and lazy like leek. I also found it in some plumbing small businesses' names and it referred to "Leaking".

A pubic hair piece. A toupee for the pubic area/genitals. In the 1700’s when mercury was used to treat sexually transmitted diseases (Gonorrhea or Syphilis) one of the side effects was the loss of pubic hair. To disguise this condition, that was not cured by mercury, a Merkin was employed.

a form of ass licking mainly seen when a boy tries it with a girl(or vice versa), and is blatantly getting nowhere.
can be said as leaking or as a name (lee-king) to make the use of the word less inconspicuous.

unnecessary people