Sillay is a mix of words silly and slay, it means exactly what it says. It´s silly (foolish) and it slays (as a form of approval). Usually used as an adjective or a verb.
person 1: I think it would be a time saver if cereal came already in a bowl.
person 2: That is so st.. actually sillay.
by m0rningpers0n October 19, 2023
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It means silly, except it has an A, which makes it sillay.
by Get sillay May 22, 2020
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Means silly, but with an A which makes it sound sillay.
by Get sillay May 22, 2020
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"i am so sillay!!!!!!!
by leafster69 May 1, 2023
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(verb) To do a dance that goes along with a certain rap song that no one likes, but everyone likes to dance to.
Leigha: Gerry, get sillay!

Gerry: *makes fists and air-knocks the sides of his head with a silly grin on his face*
by LeeLeeLuvsOzzie August 7, 2008
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A code word for the word thick, mostly used by guys
Brad: Yo Becky's sillay as fuck
Chad: Yeah i know bro she's sillay
Becky: What are you guys talking about
by Dan,erddjssj November 2, 2019
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