nalolbittif - You're not laughing out loud, but you're trying to act like

You're not laughing out loud, but you're trying to act like you are. It’s like you’re a fake laugh factory.

'I texted 'lol' but it was actually a nalolbittif because I was crying inside.'

'She did a nalolbittif during my presentation. I knew she was judging me.'

'He did a nalolbittif when I said 'I hate math' in front of the class.'