LEG UP

Leg up - a boost, and edge, an advantage.

e.g.

If you start studying now, that will give you a leg up when you take the finals.

or

For those not totally immersed in the Thoroughbred horse racing world, trainers give "a leg up" to the jockeys contracted to ride their horses.

http://coasttocoastracing.blogspot.com/

TRADE OFF

the exchange of something for another.

e.g.

As a trade-off for babysitting, Joe's moother could use their washing machine, dryer and iron.

or

The conventional trade-off model states that unless there is some slack in the system, improving any one of the four basic manufacturing capabilities.

http://www.ifm.eng.cam.ac.uk/dstools/paradigm/trade.html

HAYWIRE

Haywire means in disorder; crazy

e.g.

After donating her eggs to a fertility clinic, Mary's period went haywire.

or

I have finished the storyline but as i am going around finishing the rest of the game my controls went haywire.

http://community.batmanarkhamcity.com/forums/showthread.php/12086-Keyboard-controls-went-haywire...-game-is-unplayable-now

HAS NOT LIVED UP TO THE HYPE

HAS NOT LIVED UP TO THE HYPE = not as good as you thought it would be.

e.g.

Dominique Rodgers-Cromartie should have been great for Asomugha's development as a player, but so far he has not lived up to the hype.

http://bleacherreport.com/articles/899438-tim-tebow-and-the-nfls-5-most-overhyped-players

PERVASIVE

Pervasive means spread throughout

e.g.

"For example, a species of flower can be pervasive in the wilderness, and a school of thought can be pervasive amongst a group of people.

http://www.businessdictionary.com/definition/pervasive.html#ixzz1lQLjUf2W

OR

Social networking for pervasive adaptation.

http://www.social-nets.eu/