Shut the fuck up, no one gives a shit about what you are saying. Garp is very similar to words like dgaf, however the fact that it is such an unknown word allows you to be more creative in your ways of shutting up.
To garp is to takesomeone from behind during a ride on public transportation. This includes buses, trains, trams but not your usual automobiles, as there is no standing room to garp properly
Human1: I can't believe that guy garped me on the bus yesterday
A person that affiliates themselves with being a nerd or ‘neek’ as some may call it. Someone that stands out in the wrong way and is associated with NPC or beggy behaviour. Typically people that are virgins or have no rizz in everyday interactions
Originally: Great African Research Project
A project undertaken in a particular online game, aimed at improving game-performance, the Great African Research Project started by Wollongong was soon abbreviated to garp. This word soon became a common word, with many uses. It could be used instead of n00b, to express surprise, or in any instance where the speaker does not really know what to say.