Imsuster is a combination of the wordsImpostor and Sus which when put together makes Imsuster so when saying "when the impostor is sus" you could instead say "When the imsuster".
A small piece of information. Derived from the word ken, used often in the scottish language and is synonymous with knowledge.
Person 1: "Hey I don't get this shit. How do you solve this problem?"
Person 2: "I got that one. Give me some kenlets on this assignment and I'll help you w/ that one."