Trimping is a movement skill that causes a player in possession of horizontal velocity on an incline to 'pop' upwards. The distance of the additional vertical movement (hereby known as a trimp) is dependent on two things when the trimp is initiated:
If the slope is facing away from the player (i.e. the player is travelling downhill) then the trimp code works in reverse -- the player loses height and increases in horizontal speed.
If in the middle of a Rampslide, a player should not be able to trimp, as the combination is too powerful for offence. The player should make a choice when hitting the ramp, then must stick with that choice.