It means laughing at something stupid or someone who makes a stupid joke online. If something or a joke is more stupid, then lambosa must be in caps,but it really doesn't matter.
God-botherer: I can't wait for our abstinence retreat this weekend! It's going to be so much fun!
Onlooker: Science help us, could she be more lamboyant?
When someone acts extremely lame. Where someone is really lame and it's sillier than a regular dinosaur on their silliest behaviour, resembling a "T-Rex".
man1 "Hey, man 2, would you like to go out upon my lamboat?"
man 2 "Depends, will there be bitches?"
man1 "Read the damn definition, of course it has bitches on it"
man 2 "Done."