l+c
L+C means you like a post and comment on it, usually on Instagram or Twitter, because you're trying to be popular.
My crush's crush posted a new post. I L+C'd it because I'm obsessed.
My mom's best friend posted a photo. I L+C'd it because I'm trying to impress her.
My neighbor's dog posted a picture of my yard. I L+C'd it because I'm a weird neighbor.