Well, stop freakin' making fun of it then -- so says comedy legend Tom Green.

The famous funnyman was out in Bev Hills when our photog played Kawhi's infamous robot-like giggle for him ... and Tom saw no humor in it whatsoever.

"This is a little pro tip here," Green told TMZ Sports ... "If somebody is laughing and having a good time, don't hate on their laugh!"

Green would know a thing or two about it -- dude's killed the comedy game for decades ... and he tells us anytime there's a weird laugh in his crowds -- it's still a laugh!!

"Don't make fun of people's laughs," Green says.

"Because then everybody starts to get self-conscious and think, 'Oh, maybe I better not laugh loudly either.'"