I've literally got macros for my mouse which changes for whichever champions I'm playing, it pops their ult and just yells something in chat. Vi and Darius - "GET DUNKED ON!" Annie - "I JUST DROPPED THE BEAR ON YOU. MWAH." Lux - "MASTER SPARK! TOUHOU KOUMAKYOU~" Velkoz - "DISINTEGRATE!" Yasuo - "YA! SU! OWNED!"

That's my method of teasing the chat.