A technique in Half-Life (mostly CS) that involves excellent timing and coordination. You can gain tremendous speed from these hops and jump extremely far. Usually used by veteran counter-strike players because it used to come in handy to get places fast, and also get away quickly. Must use strafing, jumping, and mouse movements to bunnyhop correctly. This is considered a bug in the coding of HL. Bunny-Hopping is a very hard technique to master but doesn't work that well anymore in most Half-life Mods.