Denver Bump:
'Tis a term used when a little extra oomph needs to be supplied to get the a/c out of (usually) hot and high airfields. I know it is fitted to GE90, V2500 and I think some operators CFM56's.
Also applies to some JT8 powered MD-80s - manually set the EPR to 2.03 (90 degree day) as opposed to the normal 1.98 max takeoff thrust. Usually only authorized domestically at KDEN, hence the name.
Dallas Bump:
The Bump-Up was also a more common event when the vertical buffers were larger.
Nice bit of reading on this Rainboe.