Put it at the centre of a visual gag, after the setup and just before the reaction shot, then follow it with Vine Boom Sound Effect for a bigger payoff or Classic Punch Sound Effect to underline the hit, keeping the slip as the start of the joke.
About this sound
This clip lasts under a second and joins a slippery cartoon skid to a big comic punch, so a stumble lands as one bouncy, harmless impact. It feels light, playful and surprising, turning a trip, bump or fake blow into instant slapstick without sounding realistic or harsh.