Another way too say "To bad so sad" and this is commonly used in people who are rude, childish, annoying, and immature or are losing an arguement, most people find this word annoying and/or funny.
Person 1:"My grandma died..."
Person 2:"womp womp
This is an example, I advise you don't do it as it is inconsiderate.
A type of slang, usually a verb, used in a type of conversation called "brainrot". skibidi relies on context, being a compliment like charisma, or attractive. or it could be an insult, such as dumb, or annoying.
"James is being so rude! he's so skibidi!"
"Bro, did you see her? she was so skibidi."