If Slap were an employee dining room table, alberteinstein would be that one coworker who invites himself to sit at the table uninvited and starts annoying everyone just by being himself, to the point where everyone’s whispering to each other “yo who invited this guy?”
Hints are dropped that he’s unwanted but he either doesn’t pick up on them or just ignores them out of denial. Everyone eventually finds a table in a more secluded area to sit away from him, and everyone’s relieved that they finally successfully ditched him, only for him to somehow find the new table and invite himself to sit again, much to the annoyance of everyone.