awknowledgement of someones comment or joke, but indicating it wasn't funny.

Referring to the heavy unfashionable winter jacket and patterned mittens Sanders wore to the inauguration of Joe Biden.

it was funny but im to lazy to type.

what lil wayne always says in the middle of his songs

When someone tells you a joke/story that's not funny.

some times used to show amusement.
sometimes used to show that what the person is saying, doing, trying to do,or asking is complete unresonable on your standards.

Like lol, it is meant to convey a laugh in texting and instant messaging, but unlike lol, you must actually have laughed before typing it. It also implies more confident laughter.

Basically it's a way to say lol, without having to say lol. It's great.