A Slattery (or Slatteries) is/are a person who is largely indefinable, as far as how they are ranked in coolness.
They can be percieved as cool in one scenario, which usually leads them to be invited to parties; whereupon they are suddenly discovered to be lame.
The strangest phenomenon concerning these people is that once their position has been ascertained at the parties as 'lame', they can quickly revert back to coolness as soon as the following day.
"I just don't know how I feel about him. He seems like he could be a slattery."
"Well, she seemed cool at the movies the other day; but last night she turned out to be a slattery."
"Come on, don't embarrass me! Everyone will think you're just a slattery."
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