Tip-of-the-Tongue (TOT)
Here's your citation in American Psychological Association (APA) format:
Tip-of-the-Tongue (TOT). (n.d.). In Alleydog.com's online glossary. Retrieved from: https://www.alleydog.com/glossary/definition-cit.php?term=Tip-of-the-Tongue+%28TOT%29