Zipup

zipup is an variable used in character assignment files, first introduced in LEGO Star Wars: The Video Game. It generally defines the ability to climb vertically in some fashion.

LEGO Star Wars
In the Lego Star Wars series of games zipup controls the ability to Grapple, as it is referred to by the games hints and manuals. The vanilla games mostly only grant the grappling abilities to characters that held a blaster, although Lego Star Wars III also gives it two characters with whips. You have to stand on top of a red, reticle-shaped circle in order to grapple (or "zip up") to higher elevations or swing to a nearby location.

LEGO Indiana Jones
The zipup variable is used for all the playable characters in the game except Student (Man), and is instead used to climb to the ropes and vines in the game.