<p>It’s probably a very bad idea. Depends on where you are applying, and what you are saying. Yes, they will know what you mean, but it is likely far less unique than you think, and probably not humorous. </p>
<p>If it actually is funny, ironic or clever, you can keep it.</p>
<p>(Note: I’ve removed it from six essays this week, and I only teach 87 seniors this year.)</p>