1: The act of throwing a party or other elaborate social event with the distinct intention to attract a specific individual, usually a current or past romantic interest
2: Making a public social media post (Instagram, Snapchat story, Facebook, etc.) that is intended to be seen or grab the attention of one particular person, typically a current or past romantic interest. This is done usually in a vague manner as not to come off as overtly obvious, to maintain plausible deniability of the intention of the post especially with the non-intended audience. This is furthered when the original poster removes the post shortly after it was viewed by the intended recipient.
John was really pulling a Gatsby last week when he threw that party, he told me he only did it to try to get his ex to pull up so he could talk to her.