I just a little new here.

[Dangerman]

What is "kick"?

[Sabriel]

1. to bump a message back up to the top by posting, usually a blank post.

[fishnfla]

2. same as BTTT

[JimmyJazz]

3. people use it when they have nothing to add to the thread

but think it worthy of others seeing it.

[Jersey Devil]

4. It is the opposite of "plonk"

plonk: excl.,vt.
The sound a newbie makes as he falls to the bottom of a kill file. While it originated in the newsgroup talk.bizarre, this term (usually written “*plonk*”) is now (1994) widespread on Usenet as a form of public ridicule.