I believe that
"to limp" is to just call with a very good hand when you believe you're ahead.
"to limp preflop" is a technique used by some to disguise their hand on the flop but has the disadvantage of allowing bad hands to see free cards. It can pay off but has lots of risks. for eg you might just call the blinds with queens hoping for low cards on the flop but the big blind with 8 3 hits two pair.
"the bubble" is the last person to be knocked out of a tournament (sng or mtt) who does not receive any prize.
When people refer to the time "around the bubble" they mean the period just before the payouts begin. This is where some poker sites syncronise tables. Players tend to tighten up play here, especially short stacks, so they can make the money.
and to add a few more...
"under the gun" or "UTG" is the first player to act in a hand. ie the person directly to the left of the big blind.
"on the button" refers to the dealer button and means the position that is last to act from the flop onwards.
Edited by awood88 (13 October 2009 @ 17:23 GMT)